72471677 has 4 divisors (see below), whose sum is σ = 73389120. Its totient is φ = 71554236.

The previous prime is 72471653. The next prime is 72471683. The reversal of 72471677 is 77617427.

72471677 = 4914² + 4915² + 4916².

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 not a de Polignac number, because 72471677 - 2¹² = 72467581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72471577) 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, 458603 + ... + 458760.

It is an arithmetic number, because the mean of its divisors is an integer number (18347280).

Almost surely, 2^72471677 is an apocalyptic number.

It is an amenable number.

72471677 is a deficient number, since it is larger than the sum of its proper divisors (917443).

72471677 is an equidigital number, since it uses as much as digits as its factorization.

72471677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917442.

The product of its digits is 115248, while the sum is 41.

The square root of 72471677 is about 8513.0298366680. The cubic root of 72471677 is about 416.9232395941.

The spelling of 72471677 in words is "seventy-two million, four hundred seventy-one thousand, six hundred seventy-seven".