72919051 has 4 divisors (see below), whose sum is σ = 73326600. Its totient is φ = 72511504.

The previous prime is 72919027. The next prime is 72919061. The reversal of 72919051 is 15091927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15091927 = 3209 ⋅4703.

It is a cyclic number.

It is not a de Polignac number, because 72919051 - 2⁵ = 72919019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72918998 and 72919016.

It is not an unprimeable number, because it can be changed into a prime (72919061) 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, 203506 + ... + 203863.

It is an arithmetic number, because the mean of its divisors is an integer number (18331650).

Almost surely, 2^72919051 is an apocalyptic number.

72919051 is a deficient number, since it is larger than the sum of its proper divisors (407549).

72919051 is a wasteful number, since it uses less digits than its factorization.

72919051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407548.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 72919051 is about 8539.2652494228. The cubic root of 72919051 is about 417.7793815301.

The spelling of 72919051 in words is "seventy-two million, nine hundred nineteen thousand, fifty-one".