90362381 has 2 divisors, whose sum is σ = 90362382. Its totient is φ = 90362380.

The previous prime is 90362369. The next prime is 90362383. The reversal of 90362381 is 18326309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89775625 + 586756 = 9475^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 90362381 - 2¹⁰ = 90361357 is a prime.

It is a super-2 number, since 2×90362381² = 16330719799978322, which contains 22 as substring.

Together with 90362383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90362383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45181190 + 45181191.

It is an arithmetic number, because the mean of its divisors is an integer number (45181191).

Almost surely, 2^90362381 is an apocalyptic number.

It is an amenable number.

90362381 is a deficient number, since it is larger than the sum of its proper divisors (1).

90362381 is an equidigital number, since it uses as much as digits as its factorization.

90362381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 90362381 is about 9505.9129493174. The cubic root of 90362381 is about 448.7411417571.

The spelling of 90362381 in words is "ninety million, three hundred sixty-two thousand, three hundred eighty-one".