3897620657 has 8 divisors (see below), whose sum is σ = 4458000000. Its totient is φ = 3338135424.

The previous prime is 3897620611. The next prime is 3897620717. The reversal of 3897620657 is 7560267983.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3897620657 is a prime.

It is a super-2 number, since 2×3897620657² = 30382893571746223298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3897620599 and 3897620608.

It is not an unprimeable number, because it can be changed into a prime (3897620257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214157 + ... + 231642.

It is an arithmetic number, because the mean of its divisors is an integer number (557250000).

Almost surely, 2^3897620657 is an apocalyptic number.

It is an amenable number.

3897620657 is a deficient number, since it is larger than the sum of its proper divisors (560379343).

3897620657 is a wasteful number, since it uses less digits than its factorization.

3897620657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447055.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The square root of 3897620657 is about 62430.9270874620. The cubic root of 3897620657 is about 1573.7407463133.

The spelling of 3897620657 in words is "three billion, eight hundred ninety-seven million, six hundred twenty thousand, six hundred fifty-seven".