90287035021 has 2 divisors, whose sum is σ = 90287035022. Its totient is φ = 90287035020.

The previous prime is 90287034991. The next prime is 90287035127. The reversal of 90287035021 is 12053078209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60905304100 + 29381730921 = 246790^2 + 171411^2 .

It is a cyclic number.

It is not a de Polignac number, because 90287035021 - 2¹³ = 90287026829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90287035621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45143517510 + 45143517511.

It is an arithmetic number, because the mean of its divisors is an integer number (45143517511).

Almost surely, 2^90287035021 is an apocalyptic number.

It is an amenable number.

90287035021 is a deficient number, since it is larger than the sum of its proper divisors (1).

90287035021 is an equidigital number, since it uses as much as digits as its factorization.

90287035021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 90287035021 in words is "ninety billion, two hundred eighty-seven million, thirty-five thousand, twenty-one".