6407691 has 8 divisors (see below), whose sum is σ = 9046224. Its totient is φ = 4020480.

The previous prime is 6407671. The next prime is 6407701. The reversal of 6407691 is 1967046.

It is a happy number.

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

It is not a de Polignac number, because 6407691 - 2⁷ = 6407563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6407671) 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, 62770 + ... + 62871.

It is an arithmetic number, because the mean of its divisors is an integer number (1130778).

Almost surely, 2^6407691 is an apocalyptic number.

6407691 is a deficient number, since it is larger than the sum of its proper divisors (2638533).

6407691 is a wasteful number, since it uses less digits than its factorization.

6407691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125661.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 6407691 is about 2531.3417390783. The cubic root of 6407691 is about 185.7378953641.

The spelling of 6407691 in words is "six million, four hundred seven thousand, six hundred ninety-one".