72097977 has 8 divisors (see below), whose sum is σ = 109863616. Its totient is φ = 41198832.

The previous prime is 72097943. The next prime is 72098017. The reversal of 72097977 is 77979027.

It is a happy number.

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

It is not a de Polignac number, because 72097977 - 2¹⁴ = 72081593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72097937) 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, 1716598 + ... + 1716639.

It is an arithmetic number, because the mean of its divisors is an integer number (13732952).

Almost surely, 2^72097977 is an apocalyptic number.

It is an amenable number.

72097977 is a deficient number, since it is larger than the sum of its proper divisors (37765639).

72097977 is a wasteful number, since it uses less digits than its factorization.

72097977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433247.

The product of its (nonzero) digits is 388962, while the sum is 48.

The square root of 72097977 is about 8491.0527615838. The cubic root of 72097977 is about 416.2053831282.

The spelling of 72097977 in words is "seventy-two million, ninety-seven thousand, nine hundred seventy-seven".