72636893 has 4 divisors (see below), whose sum is σ = 83013600. Its totient is φ = 62260188.

The previous prime is 72636887. The next prime is 72636899. The reversal of 72636893 is 39863627.

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 an interprime number because it is at equal distance from previous prime (72636887) and next prime (72636899).

It is a cyclic number.

It is not a de Polignac number, because 72636893 - 2⁸ = 72636637 is a prime.

It is a super-2 number, since 2×72636893² = 10552236449386898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72636899) 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, 5188343 + ... + 5188356.

It is an arithmetic number, because the mean of its divisors is an integer number (20753400).

Almost surely, 2^72636893 is an apocalyptic number.

It is an amenable number.

72636893 is a deficient number, since it is larger than the sum of its proper divisors (10376707).

72636893 is a wasteful number, since it uses less digits than its factorization.

72636893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376706.

The product of its digits is 326592, while the sum is 44.

The square root of 72636893 is about 8522.7280256969. The cubic root of 72636893 is about 417.2398235551.

The spelling of 72636893 in words is "seventy-two million, six hundred thirty-six thousand, eight hundred ninety-three".