71572953 has 4 divisors (see below), whose sum is σ = 95430608. Its totient is φ = 47715300.

The previous prime is 71572939. The next prime is 71572967. The reversal of 71572953 is 35927517.

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 an interprime number because it is at equal distance from previous prime (71572939) and next prime (71572967).

It is not a de Polignac number, because 71572953 - 2⁹ = 71572441 is a prime.

It is a super-2 number, since 2×71572953² = 10245375202280418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71572913) 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, 11928823 + ... + 11928828.

It is an arithmetic number, because the mean of its divisors is an integer number (23857652).

Almost surely, 2^71572953 is an apocalyptic number.

It is an amenable number.

71572953 is a deficient number, since it is larger than the sum of its proper divisors (23857655).

71572953 is a wasteful number, since it uses less digits than its factorization.

71572953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23857654.

The product of its digits is 66150, while the sum is 39.

The square root of 71572953 is about 8460.0799641611. The cubic root of 71572953 is about 415.1926390693.

The spelling of 71572953 in words is "seventy-one million, five hundred seventy-two thousand, nine hundred fifty-three".