156868439 has 16 divisors (see below), whose sum is σ = 194557440. Its totient is φ = 123158880.

The previous prime is 156868421. The next prime is 156868447. The reversal of 156868439 is 934868651.

It is not a de Polignac number, because 156868439 - 2¹² = 156864343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156868409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5342 + ... + 18500.

It is an arithmetic number, because the mean of its divisors is an integer number (12159840).

Almost surely, 2^156868439 is an apocalyptic number.

156868439 is a deficient number, since it is larger than the sum of its proper divisors (37689001).

156868439 is a wasteful number, since it uses less digits than its factorization.

156868439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13310.

The product of its digits is 1244160, while the sum is 50.

The square root of 156868439 is about 12524.7131304473. The cubic root of 156868439 is about 539.3183431343.

It can be divided in two parts, 1568 and 68439, that added together give a palindrome (70007).

The spelling of 156868439 in words is "one hundred fifty-six million, eight hundred sixty-eight thousand, four hundred thirty-nine".