72977549 has 8 divisors (see below), whose sum is σ = 77614848. Its totient is φ = 68378560.

The previous prime is 72977519. The next prime is 72977561. The reversal of 72977549 is 94577927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72977549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72977497 and 72977506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72977519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5597 + ... + 13314.

It is an arithmetic number, because the mean of its divisors is an integer number (9701856).

Almost surely, 2^72977549 is an apocalyptic number.

It is an amenable number.

72977549 is a deficient number, since it is larger than the sum of its proper divisors (4637299).

72977549 is a wasteful number, since it uses less digits than its factorization.

72977549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19155.

The product of its digits is 1111320, while the sum is 50.

The square root of 72977549 is about 8542.6897988865. The cubic root of 72977549 is about 417.8910703390.

The spelling of 72977549 in words is "seventy-two million, nine hundred seventy-seven thousand, five hundred forty-nine".