17231989 has 2 divisors, whose sum is σ = 17231990. Its totient is φ = 17231988.

The previous prime is 17231983. The next prime is 17232053. The reversal of 17231989 is 98913271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 339889 = 4110^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 17231989 - 2⁵ = 17231957 is a prime.

It is a super-2 number, since 2×17231989² = 593882889792242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17231983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8615994 + 8615995.

It is an arithmetic number, because the mean of its divisors is an integer number (8615995).

Almost surely, 2^17231989 is an apocalyptic number.

It is an amenable number.

17231989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17231989 is an equidigital number, since it uses as much as digits as its factorization.

17231989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 17231989 is about 4151.1430955822. The cubic root of 17231989 is about 258.2925042191.

The spelling of 17231989 in words is "seventeen million, two hundred thirty-one thousand, nine hundred eighty-nine".