91970120697 has 128 divisors (see below), whose sum is σ = 158985093120. Its totient is φ = 45995040000.

The previous prime is 91970120623. The next prime is 91970120707. The reversal of 91970120697 is 79602107919.

It is a happy number.

It is not a de Polignac number, because 91970120697 - 2⁷ = 91970120569 is a prime.

It is a super-3 number, since 3×91970120697³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91970120497) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 100954672 + ... + 100955582.

It is an arithmetic number, because the mean of its divisors is an integer number (1242071040).

Almost surely, 2^91970120697 is an apocalyptic number.

It is an amenable number.

91970120697 is a deficient number, since it is larger than the sum of its proper divisors (67014972423).

91970120697 is a wasteful number, since it uses less digits than its factorization.

91970120697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195.

The product of its (nonzero) digits is 428652, while the sum is 51.

The spelling of 91970120697 in words is "ninety-one billion, nine hundred seventy million, one hundred twenty thousand, six hundred ninety-seven".