156507949 has 4 divisors (see below), whose sum is σ = 168547036. Its totient is φ = 144468864.

The previous prime is 156507941. The next prime is 156507991. The reversal of 156507949 is 949705651.

156507949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61308900 + 95199049 = 7830^2 + 9757^2 .

It is a cyclic number.

It is not a de Polignac number, because 156507949 - 2³ = 156507941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156507899 and 156507908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156507941) 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, 6019524 + ... + 6019549.

It is an arithmetic number, because the mean of its divisors is an integer number (42136759).

Almost surely, 2^156507949 is an apocalyptic number.

It is an amenable number.

156507949 is a deficient number, since it is larger than the sum of its proper divisors (12039087).

156507949 is a wasteful number, since it uses less digits than its factorization.

156507949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12039086.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 156507949 is about 12510.3137050995. The cubic root of 156507949 is about 538.9049011684.

The spelling of 156507949 in words is "one hundred fifty-six million, five hundred seven thousand, nine hundred forty-nine".