72472773 has 4 divisors (see below), whose sum is σ = 96630368. Its totient is φ = 48315180.

The previous prime is 72472739. The next prime is 72472831. The reversal of 72472773 is 37727427.

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: 37727427 = 3 ⋅12575809.

It is not a de Polignac number, because 72472773 - 2¹² = 72468677 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 (72472703) 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, 12078793 + ... + 12078798.

It is an arithmetic number, because the mean of its divisors is an integer number (24157592).

Almost surely, 2^72472773 is an apocalyptic number.

It is an amenable number.

72472773 is a deficient number, since it is larger than the sum of its proper divisors (24157595).

72472773 is a wasteful number, since it uses less digits than its factorization.

72472773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24157594.

The product of its digits is 115248, while the sum is 39.

The square root of 72472773 is about 8513.0942083358. The cubic root of 72472773 is about 416.9253413144.

The spelling of 72472773 in words is "seventy-two million, four hundred seventy-two thousand, seven hundred seventy-three".