136938357923 has 4 divisors (see below), whose sum is σ = 137224242240. Its totient is φ = 136652473608.

The previous prime is 136938357917. The next prime is 136938357929. The reversal of 136938357923 is 329753839631.

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

It is an interprime number because it is at equal distance from previous prime (136938357917) and next prime (136938357929).

It is a cyclic number.

It is not a de Polignac number, because 136938357923 - 2²⁰ = 136937309347 is a prime.

It is a super-2 number, since 2×136938357923² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136938357929) 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, 142941440 + ... + 142942397.

It is an arithmetic number, because the mean of its divisors is an integer number (34306060560).

Almost surely, 2^136938357923 is an apocalyptic number.

136938357923 is a deficient number, since it is larger than the sum of its proper divisors (285884317).

136938357923 is an equidigital number, since it uses as much as digits as its factorization.

136938357923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285884316.

The product of its digits is 22044960, while the sum is 59.

The spelling of 136938357923 in words is "one hundred thirty-six billion, nine hundred thirty-eight million, three hundred fifty-seven thousand, nine hundred twenty-three".