166379489 has 2 divisors, whose sum is σ = 166379490. Its totient is φ = 166379488.

The previous prime is 166379441. The next prime is 166379497. The reversal of 166379489 is 984973661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133980625 + 32398864 = 11575^2 + 5692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166379489 is a prime.

It is a super-2 number, since 2×166379489² = 55364268719802242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166379489.

It is not a weakly prime, because it can be changed into another prime (166379419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83189744 + 83189745.

It is an arithmetic number, because the mean of its divisors is an integer number (83189745).

Almost surely, 2^166379489 is an apocalyptic number.

It is an amenable number.

166379489 is a deficient number, since it is larger than the sum of its proper divisors (1).

166379489 is an equidigital number, since it uses as much as digits as its factorization.

166379489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 166379489 is about 12898.8173488890. The cubic root of 166379489 is about 550.0049465120.

The spelling of 166379489 in words is "one hundred sixty-six million, three hundred seventy-nine thousand, four hundred eighty-nine".