166953937 has 2 divisors, whose sum is σ = 166953938. Its totient is φ = 166953936.

The previous prime is 166953877. The next prime is 166953947. The reversal of 166953937 is 739359661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135582736 + 31371201 = 11644^2 + 5601^2 .

It is a cyclic number.

It is not a de Polignac number, because 166953937 - 2¹⁵ = 166921169 is a prime.

It is not a weakly prime, because it can be changed into another prime (166953947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83476968 + 83476969.

It is an arithmetic number, because the mean of its divisors is an integer number (83476969).

Almost surely, 2^166953937 is an apocalyptic number.

It is an amenable number.

166953937 is a deficient number, since it is larger than the sum of its proper divisors (1).

166953937 is an equidigital number, since it uses as much as digits as its factorization.

166953937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 49.

The square root of 166953937 is about 12921.0656294286. The cubic root of 166953937 is about 550.6372085773.

The spelling of 166953937 in words is "one hundred sixty-six million, nine hundred fifty-three thousand, nine hundred thirty-seven".