72700993 has 4 divisors (see below), whose sum is σ = 76977540. Its totient is φ = 68424448.

The previous prime is 72700987. The next prime is 72701009. The reversal of 72700993 is 39900727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39900727 = 2243 ⋅17789.

It can be written as a sum of positive squares in 2 ways, for example, as 34656769 + 38044224 = 5887^2 + 6168^2 .

It is a cyclic number.

It is not a de Polignac number, because 72700993 - 2⁵ = 72700961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72700933) 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, 2138248 + ... + 2138281.

It is an arithmetic number, because the mean of its divisors is an integer number (19244385).

Almost surely, 2^72700993 is an apocalyptic number.

It is an amenable number.

72700993 is a deficient number, since it is larger than the sum of its proper divisors (4276547).

72700993 is a wasteful number, since it uses less digits than its factorization.

72700993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276546.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 72700993 is about 8526.4877294229. The cubic root of 72700993 is about 417.3625215771.

The spelling of 72700993 in words is "seventy-two million, seven hundred thousand, nine hundred ninety-three".