72913963 has 4 divisors (see below), whose sum is σ = 76751560. Its totient is φ = 69076368.

The previous prime is 72913957. The next prime is 72913987. The reversal of 72913963 is 36931927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36931927 = 751 ⋅49177.

It is a cyclic number.

It is not a de Polignac number, because 72913963 - 2⁵ = 72913931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72913913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1918770 + ... + 1918807.

It is an arithmetic number, because the mean of its divisors is an integer number (19187890).

Almost surely, 2^72913963 is an apocalyptic number.

72913963 is a deficient number, since it is larger than the sum of its proper divisors (3837597).

72913963 is a wasteful number, since it uses less digits than its factorization.

72913963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837596.

The product of its digits is 61236, while the sum is 40.

The square root of 72913963 is about 8538.9673263223. The cubic root of 72913963 is about 417.7696643122.

The spelling of 72913963 in words is "seventy-two million, nine hundred thirteen thousand, nine hundred sixty-three".