689714537 has 2 divisors, whose sum is σ = 689714538. Its totient is φ = 689714536.

The previous prime is 689714527. The next prime is 689714551. The reversal of 689714537 is 735417986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682829161 + 6885376 = 26131^2 + 2624^2 .

It is a cyclic number.

It is not a de Polignac number, because 689714537 - 2²⁸ = 421279081 is a prime.

It is a super-2 number, since 2×689714537² = 951412285098248738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (689714507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344857268 + 344857269.

It is an arithmetic number, because the mean of its divisors is an integer number (344857269).

Almost surely, 2^689714537 is an apocalyptic number.

It is an amenable number.

689714537 is a deficient number, since it is larger than the sum of its proper divisors (1).

689714537 is an equidigital number, since it uses as much as digits as its factorization.

689714537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 689714537 is about 26262.4168156703. The cubic root of 689714537 is about 883.5337150563.

The spelling of 689714537 in words is "six hundred eighty-nine million, seven hundred fourteen thousand, five hundred thirty-seven".