167961631 has 2 divisors, whose sum is σ = 167961632. Its totient is φ = 167961630.

The previous prime is 167961559. The next prime is 167961643. The reversal of 167961631 is 136169761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 167961631 - 2⁹ = 167961119 is a prime.

It is a super-2 number, since 2×167961631² = 56422218976360322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167964631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83980815 + 83980816.

It is an arithmetic number, because the mean of its divisors is an integer number (83980816).

Almost surely, 2^167961631 is an apocalyptic number.

167961631 is a deficient number, since it is larger than the sum of its proper divisors (1).

167961631 is an equidigital number, since it uses as much as digits as its factorization.

167961631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 167961631 is about 12960.0011959876. The cubic root of 167961631 is about 551.7428252677.

The spelling of 167961631 in words is "one hundred sixty-seven million, nine hundred sixty-one thousand, six hundred thirty-one".