72473693 has 4 divisors (see below), whose sum is σ = 73044480. Its totient is φ = 71902908.

The previous prime is 72473683. The next prime is 72473701. The reversal of 72473693 is 39637427.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39637427 = 149 ⋅266023.

It is a cyclic number.

It is not a de Polignac number, because 72473693 - 2¹² = 72469597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72473693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72473603) 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, 285203 + ... + 285456.

It is an arithmetic number, because the mean of its divisors is an integer number (18261120).

Almost surely, 2^72473693 is an apocalyptic number.

It is an amenable number.

72473693 is a deficient number, since it is larger than the sum of its proper divisors (570787).

72473693 is a wasteful number, since it uses less digits than its factorization.

72473693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570786.

The product of its digits is 190512, while the sum is 41.

The square root of 72473693 is about 8513.1482425716. The cubic root of 72473693 is about 416.9271055157.

The spelling of 72473693 in words is "seventy-two million, four hundred seventy-three thousand, six hundred ninety-three".