156097409 has 8 divisors (see below), whose sum is σ = 169594152. Its totient is φ = 142813440.

The previous prime is 156097397. The next prime is 156097441. The reversal of 156097409 is 904790651.

156097409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 38440000 + 117657409 = 6200^2 + 10847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156097409 - 2⁴ = 156097393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (156097489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51662 + ... + 54599.

It is an arithmetic number, because the mean of its divisors is an integer number (21199269).

Almost surely, 2^156097409 is an apocalyptic number.

It is an amenable number.

156097409 is a deficient number, since it is larger than the sum of its proper divisors (13496743).

156097409 is a wasteful number, since it uses less digits than its factorization.

156097409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106387.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 156097409 is about 12493.8948690951. The cubic root of 156097409 is about 538.4332834849.

The spelling of 156097409 in words is "one hundred fifty-six million, ninety-seven thousand, four hundred nine".