167805961 has 2 divisors, whose sum is σ = 167805962. Its totient is φ = 167805960.

The previous prime is 167805949. The next prime is 167805983. The reversal of 167805961 is 169508761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114062400 + 53743561 = 10680^2 + 7331^2 .

It is a cyclic number.

It is not a de Polignac number, because 167805961 - 2¹¹ = 167803913 is a prime.

It is not a weakly prime, because it can be changed into another prime (167805061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83902980 + 83902981.

It is an arithmetic number, because the mean of its divisors is an integer number (83902981).

Almost surely, 2^167805961 is an apocalyptic number.

It is an amenable number.

167805961 is a deficient number, since it is larger than the sum of its proper divisors (1).

167805961 is an equidigital number, since it uses as much as digits as its factorization.

167805961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 167805961 is about 12953.9940172906. The cubic root of 167805961 is about 551.5723173695.

The spelling of 167805961 in words is "one hundred sixty-seven million, eight hundred five thousand, nine hundred sixty-one".