71983913 has 8 divisors (see below), whose sum is σ = 76812000. Its totient is φ = 67259808.

The previous prime is 71983903. The next prime is 71983921. The reversal of 71983913 is 31938917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71983913 - 2⁸ = 71983657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71983903) 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 7 ways as a sum of consecutive naturals, for example, 24563 + ... + 27336.

It is an arithmetic number, because the mean of its divisors is an integer number (9601500).

Almost surely, 2^71983913 is an apocalyptic number.

71983913 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

71983913 is a deficient number, since it is larger than the sum of its proper divisors (4828087).

71983913 is a wasteful number, since it uses less digits than its factorization.

71983913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51991.

The product of its digits is 40824, while the sum is 41.

The square root of 71983913 is about 8484.3333857175. Note that the first 4 decimals coincide. The cubic root of 71983913 is about 415.9857786836.

It can be divided in two parts, 7198 and 3913, that added together give a palindrome (11111).

The spelling of 71983913 in words is "seventy-one million, nine hundred eighty-three thousand, nine hundred thirteen".