90986362991 has 4 divisors (see below), whose sum is σ = 90987936984. Its totient is φ = 90984789000.

The previous prime is 90986362969. The next prime is 90986363047. The reversal of 90986362991 is 19926368909.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90986362991 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 (90986362921) 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, 696845 + ... + 817046.

It is an arithmetic number, because the mean of its divisors is an integer number (22746984246).

Almost surely, 2^90986362991 is an apocalyptic number.

90986362991 is a deficient number, since it is larger than the sum of its proper divisors (1573993).

90986362991 is a wasteful number, since it uses less digits than its factorization.

90986362991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573992.

The product of its (nonzero) digits is 11337408, while the sum is 62.

The spelling of 90986362991 in words is "ninety billion, nine hundred eighty-six million, three hundred sixty-two thousand, nine hundred ninety-one".