136923469 has 4 divisors (see below), whose sum is σ = 136970620. Its totient is φ = 136876320.

The previous prime is 136923461. The next prime is 136923487. The reversal of 136923469 is 964329631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48469444 + 88454025 = 6962^2 + 9405^2 .

It is a cyclic number.

It is not a de Polignac number, because 136923469 - 2³ = 136923461 is a prime.

It is a super-2 number, since 2×136923469² = 37496072725987922, which 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 (136923461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18912 + ... + 25129.

It is an arithmetic number, because the mean of its divisors is an integer number (34242655).

Almost surely, 2^136923469 is an apocalyptic number.

It is an amenable number.

136923469 is a deficient number, since it is larger than the sum of its proper divisors (47151).

136923469 is an equidigital number, since it uses as much as digits as its factorization.

136923469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47150.

The product of its digits is 209952, while the sum is 43.

The square root of 136923469 is about 11701.4302117305. The cubic root of 136923469 is about 515.4176635096.

It can be divided in two parts, 13692 and 3469, that added together give a square (17161 = 131²).

The spelling of 136923469 in words is "one hundred thirty-six million, nine hundred twenty-three thousand, four hundred sixty-nine".