690557137 has 8 divisors (see below), whose sum is σ = 707928480. Its totient is φ = 673211040.

The previous prime is 690557117. The next prime is 690557207. The reversal of 690557137 is 731755096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690557137 - 2⁷ = 690557009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690557093 and 690557102.

It is not an unprimeable number, because it can be changed into a prime (690557107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56914 + ... + 67972.

It is an arithmetic number, because the mean of its divisors is an integer number (88491060).

Almost surely, 2^690557137 is an apocalyptic number.

It is an amenable number.

690557137 is a deficient number, since it is larger than the sum of its proper divisors (17371343).

690557137 is a wasteful number, since it uses less digits than its factorization.

690557137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 690557137 is about 26278.4538548218. The cubic root of 690557137 is about 883.8933626649.

The spelling of 690557137 in words is "six hundred ninety million, five hundred fifty-seven thousand, one hundred thirty-seven".