72969775 has 12 divisors (see below), whose sum is σ = 90878112. Its totient is φ = 58120640.

The previous prime is 72969769. The next prime is 72969781. The reversal of 72969775 is 57796927.

It is an interprime number because it is at equal distance from previous prime (72969769) and next prime (72969781).

It is a de Polignac number, because none of the positive numbers 2^k-72969775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439 + ... + 12088.

It is an arithmetic number, because the mean of its divisors is an integer number (7573176).

Almost surely, 2^72969775 is an apocalyptic number.

72969775 is a deficient number, since it is larger than the sum of its proper divisors (17908337).

72969775 is a wasteful number, since it uses less digits than its factorization.

72969775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12770 (or 12765 counting only the distinct ones).

The product of its digits is 1666980, while the sum is 52.

The square root of 72969775 is about 8542.2347778553. The cubic root of 72969775 is about 417.8762310695.

It can be divided in two parts, 7296 and 9775, that added together give a palindrome (17071).

The spelling of 72969775 in words is "seventy-two million, nine hundred sixty-nine thousand, seven hundred seventy-five".