133956457 has 4 divisors (see below), whose sum is σ = 133984836. Its totient is φ = 133928080.

The previous prime is 133956437. The next prime is 133956461. The reversal of 133956457 is 754659331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754659331 = 43 ⋅17550217.

It can be written as a sum of positive squares in 2 ways, for example, as 65464281 + 68492176 = 8091^2 + 8276^2 .

It is a cyclic number.

It is not a de Polignac number, because 133956457 - 2¹¹ = 133954409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133956437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5218 + ... + 17179.

It is an arithmetic number, because the mean of its divisors is an integer number (33496209).

Almost surely, 2^133956457 is an apocalyptic number.

It is an amenable number.

133956457 is a deficient number, since it is larger than the sum of its proper divisors (28379).

133956457 is an equidigital number, since it uses as much as digits as its factorization.

133956457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28378.

The product of its digits is 340200, while the sum is 43.

The square root of 133956457 is about 11573.9559788345. The cubic root of 133956457 is about 511.6675609393.

The spelling of 133956457 in words is "one hundred thirty-three million, nine hundred fifty-six thousand, four hundred fifty-seven".