157039439 has 4 divisors (see below), whose sum is σ = 159027360. Its totient is φ = 155051520.

The previous prime is 157039429. The next prime is 157039447. The reversal of 157039439 is 934930751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934930751 = 269 ⋅3475579.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157039439 is a prime.

It is a super-2 number, since 2×157039439² = 49322770802869442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157039396 and 157039405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157039409) 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, 993842 + ... + 993999.

It is an arithmetic number, because the mean of its divisors is an integer number (39756840).

Almost surely, 2^157039439 is an apocalyptic number.

157039439 is a deficient number, since it is larger than the sum of its proper divisors (1987921).

157039439 is an equidigital number, since it uses as much as digits as its factorization.

157039439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987920.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 157039439 is about 12531.5377747506. The cubic root of 157039439 is about 539.5142396598.

The spelling of 157039439 in words is "one hundred fifty-seven million, thirty-nine thousand, four hundred thirty-nine".