72894531 has 8 divisors (see below), whose sum is σ = 97686864. Its totient is φ = 48349280.

The previous prime is 72894529. The next prime is 72894533. The reversal of 72894531 is 13549827.

It is an interprime number because it is at equal distance from previous prime (72894529) and next prime (72894533).

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 72894531 - 2¹ = 72894529 is a prime.

It is a super-2 number, since 2×72894531² = 10627225299419922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72894531.

It is not an unprimeable number, because it can be changed into a prime (72894533) 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, 61080 + ... + 62261.

It is an arithmetic number, because the mean of its divisors is an integer number (12210858).

Almost surely, 2^72894531 is an apocalyptic number.

72894531 is a deficient number, since it is larger than the sum of its proper divisors (24792333).

72894531 is a wasteful number, since it uses less digits than its factorization.

72894531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123541.

The product of its digits is 60480, while the sum is 39.

The square root of 72894531 is about 8537.8294079936. The cubic root of 72894531 is about 417.7325483239.

It can be divided in two parts, 728 and 94531, that added together give a palindrome (95259).

The spelling of 72894531 in words is "seventy-two million, eight hundred ninety-four thousand, five hundred thirty-one".