72908773 has 4 divisors (see below), whose sum is σ = 83324320. Its totient is φ = 62493228.

The previous prime is 72908753. The next prime is 72908809. The reversal of 72908773 is 37780927.

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: 37780927 = 23 ⋅1642649.

It is not a de Polignac number, because 72908773 - 2⁵ = 72908741 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 (72908743) 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, 5207763 + ... + 5207776.

It is an arithmetic number, because the mean of its divisors is an integer number (20831080).

Almost surely, 2^72908773 is an apocalyptic number.

It is an amenable number.

72908773 is a deficient number, since it is larger than the sum of its proper divisors (10415547).

72908773 is a wasteful number, since it uses less digits than its factorization.

72908773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10415546.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 72908773 is about 8538.6634199973. The cubic root of 72908773 is about 417.7597518258.

The spelling of 72908773 in words is "seventy-two million, nine hundred eight thousand, seven hundred seventy-three".