156949949 has 8 divisors (see below), whose sum is σ = 169128960. Its totient is φ = 144786096.

The previous prime is 156949913. The next prime is 156949997. The reversal of 156949949 is 949949651.

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

It is not a de Polignac number, because 156949949 - 2⁸ = 156949693 is a prime.

It is a super-2 number, since 2×156949949² = 49266572982205202, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 156949894 and 156949903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156949909) 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, 27092 + ... + 32370.

It is an arithmetic number, because the mean of its divisors is an integer number (21141120).

Almost surely, 2^156949949 is an apocalyptic number.

It is an amenable number.

156949949 is a deficient number, since it is larger than the sum of its proper divisors (12179011).

156949949 is a wasteful number, since it uses less digits than its factorization.

156949949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579.

The product of its digits is 3149280, while the sum is 56.

The square root of 156949949 is about 12527.9666746045. The cubic root of 156949949 is about 539.4117382253.

The spelling of 156949949 in words is "one hundred fifty-six million, nine hundred forty-nine thousand, nine hundred forty-nine".