646701403 has 12 divisors (see below), whose sum is σ = 690064920. Its totient is φ = 603946880.

The previous prime is 646701401. The next prime is 646701409. The reversal of 646701403 is 304107646.

It is not a de Polignac number, because 646701403 - 2¹ = 646701401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646701401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1402593 + ... + 1403053.

It is an arithmetic number, because the mean of its divisors is an integer number (57505410).

Almost surely, 2^646701403 is an apocalyptic number.

646701403 is a deficient number, since it is larger than the sum of its proper divisors (43363517).

646701403 is an equidigital number, since it uses as much as digits as its factorization.

646701403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 646701403 is about 25430.3244768918. The cubic root of 646701403 is about 864.7712997577.

The spelling of 646701403 in words is "six hundred forty-six million, seven hundred one thousand, four hundred three".