696509137 has 2 divisors, whose sum is σ = 696509138. Its totient is φ = 696509136.

The previous prime is 696509131. The next prime is 696509167. The reversal of 696509137 is 731905696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417752721 + 278756416 = 20439^2 + 16696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-696509137 is a prime.

It is not a weakly prime, because it can be changed into another prime (696509131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348254568 + 348254569.

It is an arithmetic number, because the mean of its divisors is an integer number (348254569).

Almost surely, 2^696509137 is an apocalyptic number.

It is an amenable number.

696509137 is a deficient number, since it is larger than the sum of its proper divisors (1).

696509137 is an equidigital number, since it uses as much as digits as its factorization.

696509137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 696509137 is about 26391.4595466033. The cubic root of 696509137 is about 886.4255646081.

It can be divided in two parts, 69650 and 9137, that added together give a palindrome (78787).

The spelling of 696509137 in words is "six hundred ninety-six million, five hundred nine thousand, one hundred thirty-seven".