90491294737 has 8 divisors (see below), whose sum is σ = 99395472960. Its totient is φ = 82001264400.

The previous prime is 90491294731. The next prime is 90491294749. The reversal of 90491294737 is 73749219409.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90491294737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90491294731) 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, 103536514 + ... + 103537387.

It is an arithmetic number, because the mean of its divisors is an integer number (12424434120).

Almost surely, 2^90491294737 is an apocalyptic number.

It is an amenable number.

90491294737 is a deficient number, since it is larger than the sum of its proper divisors (8904178223).

90491294737 is a wasteful number, since it uses less digits than its factorization.

90491294737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207073943.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The spelling of 90491294737 in words is "ninety billion, four hundred ninety-one million, two hundred ninety-four thousand, seven hundred thirty-seven".