91475839607 has 4 divisors (see below), whose sum is σ = 91676006016. Its totient is φ = 91275673200.

The previous prime is 91475839603. The next prime is 91475839639. The reversal of 91475839607 is 70693857419.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91475839607 - 2² = 91475839603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91475839603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100082519 + ... + 100083432.

It is an arithmetic number, because the mean of its divisors is an integer number (22919001504).

Almost surely, 2^91475839607 is an apocalyptic number.

91475839607 is a deficient number, since it is larger than the sum of its proper divisors (200166409).

91475839607 is a wasteful number, since it uses less digits than its factorization.

91475839607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200166408.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 91475839607 in words is "ninety-one billion, four hundred seventy-five million, eight hundred thirty-nine thousand, six hundred seven".