672991017 has 8 divisors (see below), whose sum is σ = 936335424. Its totient is φ = 429153648.

The previous prime is 672991013. The next prime is 672991043. The reversal of 672991017 is 710199276.

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 672991017 - 2² = 672991013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672991017.

It is not an unprimeable number, because it can be changed into a prime (672991013) 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, 4876678 + ... + 4876815.

It is an arithmetic number, because the mean of its divisors is an integer number (117041928).

Almost surely, 2^672991017 is an apocalyptic number.

It is an amenable number.

672991017 is a deficient number, since it is larger than the sum of its proper divisors (263344407).

672991017 is a wasteful number, since it uses less digits than its factorization.

672991017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9753519.

The product of its (nonzero) digits is 47628, while the sum is 42.

The square root of 672991017 is about 25942.0704069664. The cubic root of 672991017 is about 876.3341896977.

The spelling of 672991017 in words is "six hundred seventy-two million, nine hundred ninety-one thousand, seventeen".