90974385883621 has 4 divisors (see below), whose sum is σ = 91779468944652. Its totient is φ = 90169302822592.

The previous prime is 90974385883613. The next prime is 90974385883729. The reversal of 90974385883621 is 12638858347909.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18378703387521 + 72595682496100 = 4287039^2 + 8520310^2 .

It is a cyclic number.

It is not a de Polignac number, because 90974385883621 - 2³ = 90974385883613 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 (90974385880621) 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, 402541530346 + ... + 402541530571.

It is an arithmetic number, because the mean of its divisors is an integer number (22944867236163).

It is a 1-persistent number, because it is pandigital, but 2⋅90974385883621 = 181948771767242 is not.

Almost surely, 2^{90974385883621} is an apocalyptic number.

It is an amenable number.

90974385883621 is a deficient number, since it is larger than the sum of its proper divisors (805083061031).

90974385883621 is a wasteful number, since it uses less digits than its factorization.

90974385883621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805083061030.

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 90974385883621 in words is "ninety trillion, nine hundred seventy-four billion, three hundred eighty-five million, eight hundred eighty-three thousand, six hundred twenty-one".