647696901 has 8 divisors (see below), whose sum is σ = 865294560. Its totient is φ = 430948592.

The previous prime is 647696897. The next prime is 647696921. The reversal of 647696901 is 109696746.

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 647696901 - 2² = 647696897 is a prime.

It is a super-2 number, since 2×647696901² = 839022551130007602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647696921) 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, 210555 + ... + 213608.

It is an arithmetic number, because the mean of its divisors is an integer number (108161820).

Almost surely, 2^647696901 is an apocalyptic number.

It is an amenable number.

647696901 is a deficient number, since it is larger than the sum of its proper divisors (217597659).

647696901 is a wasteful number, since it uses less digits than its factorization.

647696901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424675.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 647696901 is about 25449.8899997623. The cubic root of 647696901 is about 865.2148000308.

The spelling of 647696901 in words is "six hundred forty-seven million, six hundred ninety-six thousand, nine hundred one".