153970931 has 2 divisors, whose sum is σ = 153970932. Its totient is φ = 153970930.

The previous prime is 153970907. The next prime is 153970933. The reversal of 153970931 is 139079351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153970931 is a prime.

It is a super-2 number, since 2×153970931² = 47414095186013522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 153970933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (153970933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76985465 + 76985466.

It is an arithmetic number, because the mean of its divisors is an integer number (76985466).

Almost surely, 2^153970931 is an apocalyptic number.

153970931 is a deficient number, since it is larger than the sum of its proper divisors (1).

153970931 is an equidigital number, since it uses as much as digits as its factorization.

153970931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 38.

The square root of 153970931 is about 12408.5023673286. The cubic root of 153970931 is about 535.9771132186.

The spelling of 153970931 in words is "one hundred fifty-three million, nine hundred seventy thousand, nine hundred thirty-one".