16958969 has 2 divisors, whose sum is σ = 16958970. Its totient is φ = 16958968.

The previous prime is 16958959. The next prime is 16958999. The reversal of 16958969 is 96985961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8779369 + 8179600 = 2963^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 16958969 - 2⁸ = 16958713 is a prime.

It is a super-2 number, since 2×16958969² = 575213259085922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16958969.

It is not a weakly prime, because it can be changed into another prime (16958959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8479484 + 8479485.

It is an arithmetic number, because the mean of its divisors is an integer number (8479485).

Almost surely, 2^16958969 is an apocalyptic number.

It is an amenable number.

16958969 is a deficient number, since it is larger than the sum of its proper divisors (1).

16958969 is an equidigital number, since it uses as much as digits as its factorization.

16958969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 53.

The square root of 16958969 is about 4118.1268800269. The cubic root of 16958969 is about 256.9211252450.

The spelling of 16958969 in words is "sixteen million, nine hundred fifty-eight thousand, nine hundred sixty-nine".