90427320721 has 8 divisors (see below), whose sum is σ = 93236625504. Its totient is φ = 87650122560.

The previous prime is 90427320713. The next prime is 90427320751. The reversal of 90427320721 is 12702372409.

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

It is a cyclic number.

It is not a de Polignac number, because 90427320721 - 2³ = 90427320713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90427320751) 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, 8020936 + ... + 8032201.

It is an arithmetic number, because the mean of its divisors is an integer number (11654578188).

Almost surely, 2^90427320721 is an apocalyptic number.

It is an amenable number.

90427320721 is a deficient number, since it is larger than the sum of its proper divisors (2809304783).

90427320721 is a wasteful number, since it uses less digits than its factorization.

90427320721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16053311.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 90427320721 in words is "ninety billion, four hundred twenty-seven million, three hundred twenty thousand, seven hundred twenty-one".