91270766971 has 4 divisors (see below), whose sum is σ = 91282707000. Its totient is φ = 91258826944.

The previous prime is 91270766933. The next prime is 91270767017. The reversal of 91270766971 is 17966707219.

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 91270766971 - 2⁹ = 91270766459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91270766921) 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, 5958541 + ... + 5973838.

It is an arithmetic number, because the mean of its divisors is an integer number (22820676750).

Almost surely, 2^91270766971 is an apocalyptic number.

91270766971 is a deficient number, since it is larger than the sum of its proper divisors (11940029).

91270766971 is a wasteful number, since it uses less digits than its factorization.

91270766971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11940028.

The product of its (nonzero) digits is 2000376, while the sum is 55.

The spelling of 91270766971 in words is "ninety-one billion, two hundred seventy million, seven hundred sixty-six thousand, nine hundred seventy-one".