72972755 has 8 divisors (see below), whose sum is σ = 92718432. Its totient is φ = 54944128.

The previous prime is 72972727. The next prime is 72972761. The reversal of 72972755 is 55727927.

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

It is a cyclic number.

It is not a de Polignac number, because 72972755 - 2¹² = 72968659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429167 + ... + 429336.

It is an arithmetic number, because the mean of its divisors is an integer number (11589804).

Almost surely, 2^72972755 is an apocalyptic number.

72972755 is a deficient number, since it is larger than the sum of its proper divisors (19745677).

72972755 is a wasteful number, since it uses less digits than its factorization.

72972755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858525.

The product of its digits is 308700, while the sum is 44.

The square root of 72972755 is about 8542.4092034976. The cubic root of 72972755 is about 417.8819195171.

The spelling of 72972755 in words is "seventy-two million, nine hundred seventy-two thousand, seven hundred fifty-five".