672712291 has 4 divisors (see below), whose sum is σ = 682187184. Its totient is φ = 663237400.

The previous prime is 672712289. The next prime is 672712351. The reversal of 672712291 is 192217276.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 672712291 - 2¹ = 672712289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 672712291.

It is not an unprimeable number, because it can be changed into a prime (672712231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4737340 + ... + 4737481.

It is an arithmetic number, because the mean of its divisors is an integer number (170546796).

Almost surely, 2^672712291 is an apocalyptic number.

672712291 is a deficient number, since it is larger than the sum of its proper divisors (9474893).

672712291 is an equidigital number, since it uses as much as digits as its factorization.

672712291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474892.

The product of its digits is 21168, while the sum is 37.

The square root of 672712291 is about 25936.6977659069. The cubic root of 672712291 is about 876.2131921185.

The spelling of 672712291 in words is "six hundred seventy-two million, seven hundred twelve thousand, two hundred ninety-one".