91906927297 has 8 divisors (see below), whose sum is σ = 97349616936. Its totient is φ = 86468282112.

The previous prime is 91906927241. The next prime is 91906927373. The reversal of 91906927297 is 79272960919.

It can be written as a sum of positive squares in 4 ways, for example, as 8409623616 + 83497303681 = 91704^2 + 288959^2 .

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

It is not a de Polignac number, because 91906927297 - 2¹⁵ = 91906894529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91906927597) 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, 964258 + ... + 1055275.

It is an arithmetic number, because the mean of its divisors is an integer number (12168702117).

Almost surely, 2^91906927297 is an apocalyptic number.

It is an amenable number.

91906927297 is a deficient number, since it is larger than the sum of its proper divisors (5442689639).

91906927297 is a wasteful number, since it uses less digits than its factorization.

91906927297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022227.

The product of its (nonzero) digits is 7715736, while the sum is 61.

The spelling of 91906927297 in words is "ninety-one billion, nine hundred six million, nine hundred twenty-seven thousand, two hundred ninety-seven".