167326421 has 2 divisors, whose sum is σ = 167326422. Its totient is φ = 167326420.

The previous prime is 167326409. The next prime is 167326441. The reversal of 167326421 is 124623761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166771396 + 555025 = 12914^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 167326421 - 2¹⁴ = 167310037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167326441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83663210 + 83663211.

It is an arithmetic number, because the mean of its divisors is an integer number (83663211).

Almost surely, 2^167326421 is an apocalyptic number.

It is an amenable number.

167326421 is a deficient number, since it is larger than the sum of its proper divisors (1).

167326421 is an equidigital number, since it uses as much as digits as its factorization.

167326421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 167326421 is about 12935.4714255028. The cubic root of 167326421 is about 551.0464056884.

The spelling of 167326421 in words is "one hundred sixty-seven million, three hundred twenty-six thousand, four hundred twenty-one".