672299081 has 4 divisors (see below), whose sum is σ = 676324992. Its totient is φ = 668273172.

The previous prime is 672299063. The next prime is 672299101. The reversal of 672299081 is 180992276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672299081 is a prime.

It is a super-2 number, since 2×672299081² = 903972108626889122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672290081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012705 + ... + 2013038.

It is an arithmetic number, because the mean of its divisors is an integer number (169081248).

Almost surely, 2^672299081 is an apocalyptic number.

It is an amenable number.

672299081 is a deficient number, since it is larger than the sum of its proper divisors (4025911).

672299081 is a wasteful number, since it uses less digits than its factorization.

672299081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025910.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 672299081 is about 25928.7308019502. The cubic root of 672299081 is about 876.0337522527.

The spelling of 672299081 in words is "six hundred seventy-two million, two hundred ninety-nine thousand, eighty-one".