612135923 has 4 divisors (see below), whose sum is σ = 699583920. Its totient is φ = 524687928.

The previous prime is 612135911. The next prime is 612135941. The reversal of 612135923 is 329531216.

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

It is a cyclic number.

It is not a de Polignac number, because 612135923 - 2⁴ = 612135907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612135923.

It is not an unprimeable number, because it can be changed into a prime (612135023) 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, 43723988 + ... + 43724001.

It is an arithmetic number, because the mean of its divisors is an integer number (174895980).

Almost surely, 2^612135923 is an apocalyptic number.

612135923 is a deficient number, since it is larger than the sum of its proper divisors (87447997).

612135923 is an equidigital number, since it uses as much as digits as its factorization.

612135923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87447996.

The product of its digits is 9720, while the sum is 32.

The square root of 612135923 is about 24741.3807820016. The cubic root of 612135923 is about 849.0813248753.

The spelling of 612135923 in words is "six hundred twelve million, one hundred thirty-five thousand, nine hundred twenty-three".