72630491 has 4 divisors (see below), whose sum is σ = 72654072. Its totient is φ = 72606912.

The previous prime is 72630487. The next prime is 72630533. The reversal of 72630491 is 19403627.

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 72630491 - 2² = 72630487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72630421) 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, 6326 + ... + 13611.

It is an arithmetic number, because the mean of its divisors is an integer number (18163518).

Almost surely, 2^72630491 is an apocalyptic number.

72630491 is a deficient number, since it is larger than the sum of its proper divisors (23581).

72630491 is a wasteful number, since it uses less digits than its factorization.

72630491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23580.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 72630491 is about 8522.3524334540. The cubic root of 72630491 is about 417.2275651020.

The spelling of 72630491 in words is "seventy-two million, six hundred thirty thousand, four hundred ninety-one".