91897490883 has 16 divisors (see below), whose sum is σ = 133731964800. Its totient is φ = 55669246080.

The previous prime is 91897490879. The next prime is 91897490891. The reversal of 91897490883 is 38809479819.

It is not a de Polignac number, because 91897490883 - 2² = 91897490879 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91897495883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583753 + ... + 724266.

It is an arithmetic number, because the mean of its divisors is an integer number (8358247800).

Almost surely, 2^91897490883 is an apocalyptic number.

91897490883 is a deficient number, since it is larger than the sum of its proper divisors (41834473917).

91897490883 is a wasteful number, since it uses less digits than its factorization.

91897490883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310162.

The product of its (nonzero) digits is 31352832, while the sum is 66.

The spelling of 91897490883 in words is "ninety-one billion, eight hundred ninety-seven million, four hundred ninety thousand, eight hundred eighty-three".