63072291 has 4 divisors (see below), whose sum is σ = 84096392. Its totient is φ = 42048192.

The previous prime is 63072287. The next prime is 63072293. The reversal of 63072291 is 19227036.

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

It is not a de Polignac number, because 63072291 - 2² = 63072287 is a prime.

It is a super-2 number, since 2×63072291² = 7956227783977362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63072293) 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, 10512046 + ... + 10512051.

It is an arithmetic number, because the mean of its divisors is an integer number (21024098).

Almost surely, 2^63072291 is an apocalyptic number.

63072291 is a deficient number, since it is larger than the sum of its proper divisors (21024101).

63072291 is a wasteful number, since it uses less digits than its factorization.

63072291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21024100.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 63072291 is about 7941.8065325214. The cubic root of 63072291 is about 398.0578583933.

The spelling of 63072291 in words is "sixty-three million, seventy-two thousand, two hundred ninety-one".