731399993137 has 8 divisors (see below), whose sum is σ = 797909120352. Its totient is φ = 664893902400.

The previous prime is 731399993113. The next prime is 731399993147.

731399993137 is nontrivially palindromic in base 10.

731399993137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 731399993137 - 2²³ = 731391604529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731399993147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240039 + ... + 1233052.

It is an arithmetic number, because the mean of its divisors is an integer number (99738640044).

Almost surely, 2^731399993137 is an apocalyptic number.

It is an amenable number.

731399993137 is a deficient number, since it is larger than the sum of its proper divisors (66509127215).

731399993137 is a wasteful number, since it uses less digits than its factorization.

731399993137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518239.

The product of its digits is 26040609, while the sum is 64.

The spelling of 731399993137 in words is "seven hundred thirty-one billion, three hundred ninety-nine million, nine hundred ninety-three thousand, one hundred thirty-seven".