167661623 has 2 divisors, whose sum is σ = 167661624. Its totient is φ = 167661622.

The previous prime is 167661589. The next prime is 167661629. The reversal of 167661623 is 326166761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 167661623 - 2¹⁴ = 167645239 is a prime.

It is a super-2 number, since 2×167661623² = 56220839653988258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167661629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83830811 + 83830812.

It is an arithmetic number, because the mean of its divisors is an integer number (83830812).

Almost surely, 2^167661623 is an apocalyptic number.

167661623 is a deficient number, since it is larger than the sum of its proper divisors (1).

167661623 is an equidigital number, since it uses as much as digits as its factorization.

167661623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 167661623 is about 12948.4216412658. The cubic root of 167661623 is about 551.4141273547.

The spelling of 167661623 in words is "one hundred sixty-seven million, six hundred sixty-one thousand, six hundred twenty-three".