3689601257 has 4 divisors (see below), whose sum is σ = 3691130196. Its totient is φ = 3688072320.

The previous prime is 3689601247. The next prime is 3689601263. The reversal of 3689601257 is 7521069863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3644657641 + 44943616 = 60371^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 3689601257 - 2¹⁸ = 3689339113 is a prime.

It is a super-2 number, since 2×3689601257² = 27226314871311960098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3689601217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760844 + ... + 765677.

It is an arithmetic number, because the mean of its divisors is an integer number (922782549).

Almost surely, 2^3689601257 is an apocalyptic number.

It is an amenable number.

3689601257 is a deficient number, since it is larger than the sum of its proper divisors (1528939).

3689601257 is a wasteful number, since it uses less digits than its factorization.

3689601257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528938.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 3689601257 is about 60742.0880197578. The cubic root of 3689601257 is about 1545.2300474014.

The spelling of 3689601257 in words is "three billion, six hundred eighty-nine million, six hundred one thousand, two hundred fifty-seven".