156844913 has 4 divisors (see below), whose sum is σ = 156967140. Its totient is φ = 156722688.

The previous prime is 156844901. The next prime is 156844921. The reversal of 156844913 is 319448651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319448651 = 2221 ⋅143831.

It can be written as a sum of positive squares in 2 ways, for example, as 148035889 + 8809024 = 12167^2 + 2968^2 .

It is a cyclic number.

It is not a de Polignac number, because 156844913 - 2¹⁶ = 156779377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156840913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59168 + ... + 61761.

It is an arithmetic number, because the mean of its divisors is an integer number (39241785).

Almost surely, 2^156844913 is an apocalyptic number.

It is an amenable number.

156844913 is a deficient number, since it is larger than the sum of its proper divisors (122227).

156844913 is a wasteful number, since it uses less digits than its factorization.

156844913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122226.

The product of its digits is 103680, while the sum is 41.

The square root of 156844913 is about 12523.7739120442. The cubic root of 156844913 is about 539.2913807579.

The spelling of 156844913 in words is "one hundred fifty-six million, eight hundred forty-four thousand, nine hundred thirteen".