646936941 has 16 divisors (see below), whose sum is σ = 995974784. Its totient is φ = 365865984.

The previous prime is 646936937. The next prime is 646936951. The reversal of 646936941 is 149639646.

It is not a de Polignac number, because 646936941 - 2² = 646936937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646936931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156760 + ... + 160833.

It is an arithmetic number, because the mean of its divisors is an integer number (62248424).

Almost surely, 2^646936941 is an apocalyptic number.

It is an amenable number.

646936941 is a deficient number, since it is larger than the sum of its proper divisors (349037843).

646936941 is a wasteful number, since it uses less digits than its factorization.

646936941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317700.

The product of its digits is 839808, while the sum is 48.

The square root of 646936941 is about 25434.9551011988. The cubic root of 646936941 is about 864.8762744173.

The spelling of 646936941 in words is "six hundred forty-six million, nine hundred thirty-six thousand, nine hundred forty-one".