6431913 has 16 divisors (see below), whose sum is σ = 9582400. Its totient is φ = 4263840.

The previous prime is 6431891. The next prime is 6431951. The reversal of 6431913 is 3191346.

6431913 is a `hidden beast` number, since 643 + 1 + 9 + 13 = 666.

It is not a de Polignac number, because 6431913 - 2⁹ = 6431401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6431963) 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, 5133 + ... + 6261.

It is an arithmetic number, because the mean of its divisors is an integer number (598900).

Almost surely, 2^6431913 is an apocalyptic number.

It is an amenable number.

6431913 is a deficient number, since it is larger than the sum of its proper divisors (3150487).

6431913 is a wasteful number, since it uses less digits than its factorization.

6431913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1343 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 6431913 is about 2536.1216453475. The cubic root of 6431913 is about 185.9716397967.

It can be divided in two parts, 643 and 1913, that added together give a triangular number (2556 = T₇₁).

The spelling of 6431913 in words is "six million, four hundred thirty-one thousand, nine hundred thirteen".