157243929 has 4 divisors (see below), whose sum is σ = 209658576. Its totient is φ = 104829284.

The previous prime is 157243927. The next prime is 157243949. The reversal of 157243929 is 929342751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157243929 - 2¹ = 157243927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157243927) 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, 26207319 + ... + 26207324.

It is an arithmetic number, because the mean of its divisors is an integer number (52414644).

Almost surely, 2^157243929 is an apocalyptic number.

It is an amenable number.

157243929 is a deficient number, since it is larger than the sum of its proper divisors (52414647).

157243929 is an equidigital number, since it uses as much as digits as its factorization.

157243929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52414646.

The product of its digits is 136080, while the sum is 42.

The square root of 157243929 is about 12539.6941350258. The cubic root of 157243929 is about 539.7483154971.

The spelling of 157243929 in words is "one hundred fifty-seven million, two hundred forty-three thousand, nine hundred twenty-nine".