72654779 has 4 divisors (see below), whose sum is σ = 72857520. Its totient is φ = 72452040.

The previous prime is 72654767. The next prime is 72654781. The reversal of 72654779 is 97745627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97745627 = 7 ⋅13963661.

It is a cyclic number.

It is not a de Polignac number, because 72654779 - 2⁴ = 72654763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72654709) 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, 100832 + ... + 101549.

It is an arithmetic number, because the mean of its divisors is an integer number (18214380).

Almost surely, 2^72654779 is an apocalyptic number.

72654779 is a deficient number, since it is larger than the sum of its proper divisors (202741).

72654779 is a wasteful number, since it uses less digits than its factorization.

72654779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202740.

The product of its digits is 740880, while the sum is 47.

The square root of 72654779 is about 8523.7772730169. Note that the first 3 decimals coincide. The cubic root of 72654779 is about 417.2740675814.

The spelling of 72654779 in words is "seventy-two million, six hundred fifty-four thousand, seven hundred seventy-nine".