90388937 has 2 divisors, whose sum is σ = 90388938. Its totient is φ = 90388936.

The previous prime is 90388933. The next prime is 90388939. The reversal of 90388937 is 73988309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51998521 + 38390416 = 7211^2 + 6196^2 .

It is a cyclic number.

It is not a de Polignac number, because 90388937 - 2² = 90388933 is a prime.

Together with 90388939, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90388891 and 90388900.

It is not a weakly prime, because it can be changed into another prime (90388931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45194468 + 45194469.

It is an arithmetic number, because the mean of its divisors is an integer number (45194469).

Almost surely, 2^90388937 is an apocalyptic number.

It is an amenable number.

90388937 is a deficient number, since it is larger than the sum of its proper divisors (1).

90388937 is an equidigital number, since it uses as much as digits as its factorization.

90388937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 90388937 is about 9507.3096615183. The cubic root of 90388937 is about 448.7850966361.

The spelling of 90388937 in words is "ninety million, three hundred eighty-eight thousand, nine hundred thirty-seven".