166931353 has 2 divisors, whose sum is σ = 166931354. Its totient is φ = 166931352.

The previous prime is 166931287. The next prime is 166931389. The reversal of 166931353 is 353139661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96589584 + 70341769 = 9828^2 + 8387^2 .

It is a cyclic number.

It is not a de Polignac number, because 166931353 - 2¹³ = 166923161 is a prime.

It is a super-2 number, since 2×166931353² = 55732153228821218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166931053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83465676 + 83465677.

It is an arithmetic number, because the mean of its divisors is an integer number (83465677).

Almost surely, 2^166931353 is an apocalyptic number.

It is an amenable number.

166931353 is a deficient number, since it is larger than the sum of its proper divisors (1).

166931353 is an equidigital number, since it uses as much as digits as its factorization.

166931353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 37.

The square root of 166931353 is about 12920.1916781447. The cubic root of 166931353 is about 550.6123790710.

The spelling of 166931353 in words is "one hundred sixty-six million, nine hundred thirty-one thousand, three hundred fifty-three".