91731488467 has 8 divisors (see below), whose sum is σ = 91843177536. Its totient is φ = 91619840832.

The previous prime is 91731488461. The next prime is 91731488479. The reversal of 91731488467 is 76488413719.

It is a happy number.

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 91731488467 - 2²³ = 91723099859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91731488461) 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, 7548198 + ... + 7560340.

It is an arithmetic number, because the mean of its divisors is an integer number (11480397192).

Almost surely, 2^91731488467 is an apocalyptic number.

91731488467 is a deficient number, since it is larger than the sum of its proper divisors (111689069).

91731488467 is a wasteful number, since it uses less digits than its factorization.

91731488467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20717.

The product of its digits is 8128512, while the sum is 58.

The spelling of 91731488467 in words is "ninety-one billion, seven hundred thirty-one million, four hundred eighty-eight thousand, four hundred sixty-seven".