72698623 has 2 divisors, whose sum is σ = 72698624. Its totient is φ = 72698622.

The previous prime is 72698609. The next prime is 72698683. The reversal of 72698623 is 32689627.

It is a weak prime.

It is an emirp because it is prime and its reverse (32689627) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72698623 is a prime.

It is a super-2 number, since 2×72698623² = 10570179572192258, 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 72698623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72698683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36349311 + 36349312.

It is an arithmetic number, because the mean of its divisors is an integer number (36349312).

Almost surely, 2^72698623 is an apocalyptic number.

72698623 is a deficient number, since it is larger than the sum of its proper divisors (1).

72698623 is an equidigital number, since it uses as much as digits as its factorization.

72698623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 72698623 is about 8526.3487496114. The cubic root of 72698623 is about 417.3579862886.

The spelling of 72698623 in words is "seventy-two million, six hundred ninety-eight thousand, six hundred twenty-three".