72961797 has 4 divisors (see below), whose sum is σ = 97282400. Its totient is φ = 48641196.

The previous prime is 72961789. The next prime is 72961829. The reversal of 72961797 is 79716927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72961797 - 2³ = 72961789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72961717) 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, 12160297 + ... + 12160302.

It is an arithmetic number, because the mean of its divisors is an integer number (24320600).

Almost surely, 2^72961797 is an apocalyptic number.

It is an amenable number.

72961797 is a deficient number, since it is larger than the sum of its proper divisors (24320603).

72961797 is a wasteful number, since it uses less digits than its factorization.

72961797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24320602.

The product of its digits is 333396, while the sum is 48.

The square root of 72961797 is about 8541.7677912713. The cubic root of 72961797 is about 417.8610013023.

It can be divided in two parts, 729 and 61797, that added together give a palindrome (62526).

The spelling of 72961797 in words is "seventy-two million, nine hundred sixty-one thousand, seven hundred ninety-seven".