156434969 has 4 divisors (see below), whose sum is σ = 165637044. Its totient is φ = 147232896.

The previous prime is 156434933. The next prime is 156434977. The reversal of 156434969 is 969434651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969434651 = 157 ⋅6174743.

It can be written as a sum of positive squares in 2 ways, for example, as 49519369 + 106915600 = 7037^2 + 10340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156434969 is a prime.

It is a super-2 number, since 2×156434969² = 48943799052061922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156434669) 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, 4601012 + ... + 4601045.

It is an arithmetic number, because the mean of its divisors is an integer number (41409261).

Almost surely, 2^156434969 is an apocalyptic number.

It is an amenable number.

156434969 is a deficient number, since it is larger than the sum of its proper divisors (9202075).

156434969 is an equidigital number, since it uses as much as digits as its factorization.

156434969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9202074.

The product of its digits is 699840, while the sum is 47.

The square root of 156434969 is about 12507.3965716291. The cubic root of 156434969 is about 538.8211239660.

The spelling of 156434969 in words is "one hundred fifty-six million, four hundred thirty-four thousand, nine hundred sixty-nine".