133870428469 has 4 divisors (see below), whose sum is σ = 134229330796. Its totient is φ = 133511526144.

The previous prime is 133870428457. The next prime is 133870428481. The reversal of 133870428469 is 964824078331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 964824078331 = 19 ⋅50780214649.

It is an interprime number because it is at equal distance from previous prime (133870428457) and next prime (133870428481).

It can be written as a sum of positive squares in 2 ways, for example, as 22511401444 + 111359027025 = 150038^2 + 333705^2 .

It is a cyclic number.

It is not a de Polignac number, because 133870428469 - 2¹⁷ = 133870297397 is a prime.

It is a super-2 number, since 2×133870428469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133870428569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179450604 + ... + 179451349.

It is an arithmetic number, because the mean of its divisors is an integer number (33557332699).

Almost surely, 2^133870428469 is an apocalyptic number.

It is an amenable number.

133870428469 is a deficient number, since it is larger than the sum of its proper divisors (358902327).

133870428469 is an equidigital number, since it uses as much as digits as its factorization.

133870428469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358902326.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 133870428469 in words is "one hundred thirty-three billion, eight hundred seventy million, four hundred twenty-eight thousand, four hundred sixty-nine".