689159131 has 2 divisors, whose sum is σ = 689159132. Its totient is φ = 689159130.

The previous prime is 689159123. The next prime is 689159137. The reversal of 689159131 is 131951986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689159131 - 2³ = 689159123 is a prime.

It is a super-2 number, since 2×689159131² = 949880615681350322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (689159137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344579565 + 344579566.

It is an arithmetic number, because the mean of its divisors is an integer number (344579566).

Almost surely, 2^689159131 is an apocalyptic number.

689159131 is a deficient number, since it is larger than the sum of its proper divisors (1).

689159131 is an equidigital number, since it uses as much as digits as its factorization.

689159131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 43.

The square root of 689159131 is about 26251.8405259517. The cubic root of 689159131 is about 883.2964904850.

The spelling of 689159131 in words is "six hundred eighty-nine million, one hundred fifty-nine thousand, one hundred thirty-one".