72969623 has 2 divisors, whose sum is σ = 72969624. Its totient is φ = 72969622.

The previous prime is 72969583. The next prime is 72969653. The reversal of 72969623 is 32696927.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72969623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72969653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36484811 + 36484812.

It is an arithmetic number, because the mean of its divisors is an integer number (36484812).

Almost surely, 2^72969623 is an apocalyptic number.

72969623 is a deficient number, since it is larger than the sum of its proper divisors (1).

72969623 is an equidigital number, since it uses as much as digits as its factorization.

72969623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 72969623 is about 8542.2258808814. The cubic root of 72969623 is about 417.8759409164.

The spelling of 72969623 in words is "seventy-two million, nine hundred sixty-nine thousand, six hundred twenty-three".