670431999 has 16 divisors (see below), whose sum is σ = 908536320. Its totient is φ = 439682880.

The previous prime is 670431977. The next prime is 670432003. The reversal of 670431999 is 999134076.

It is not a de Polignac number, because 670431999 - 2⁸ = 670431743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670431299) 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, 61564 + ... + 71630.

It is an arithmetic number, because the mean of its divisors is an integer number (56783520).

Almost surely, 2^670431999 is an apocalyptic number.

670431999 is a deficient number, since it is larger than the sum of its proper divisors (238104321).

670431999 is a wasteful number, since it uses less digits than its factorization.

670431999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10430.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 670431999 is about 25892.7016550996. The cubic root of 670431999 is about 875.2220384539. Note that the first 3 decimals are identical.

The spelling of 670431999 in words is "six hundred seventy million, four hundred thirty-one thousand, nine hundred ninety-nine".