307968631 has 2 divisors, whose sum is σ = 307968632. Its totient is φ = 307968630.

The previous prime is 307968629. The next prime is 307968641. The reversal of 307968631 is 136869703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 307968631 - 2¹ = 307968629 is a prime.

It is a super-2 number, since 2×307968631² = 189689355360028322, which contains 22 as substring.

Together with 307968629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307968641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153984315 + 153984316.

It is an arithmetic number, because the mean of its divisors is an integer number (153984316).

Almost surely, 2^307968631 is an apocalyptic number.

307968631 is a deficient number, since it is larger than the sum of its proper divisors (1).

307968631 is an equidigital number, since it uses as much as digits as its factorization.

307968631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 307968631 is about 17549.0350446969. The cubic root of 307968631 is about 675.3084139766.

The spelling of 307968631 in words is "three hundred seven million, nine hundred sixty-eight thousand, six hundred thirty-one".