90420371 has 2 divisors, whose sum is σ = 90420372. Its totient is φ = 90420370.

The previous prime is 90420329. The next prime is 90420377. The reversal of 90420371 is 17302409.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90420371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90420371.

It is not a weakly prime, because it can be changed into another prime (90420377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45210185 + 45210186.

It is an arithmetic number, because the mean of its divisors is an integer number (45210186).

Almost surely, 2^90420371 is an apocalyptic number.

90420371 is a deficient number, since it is larger than the sum of its proper divisors (1).

90420371 is an equidigital number, since it uses as much as digits as its factorization.

90420371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 90420371 is about 9508.9626668738. The cubic root of 90420371 is about 448.8371143431.

The spelling of 90420371 in words is "ninety million, four hundred twenty thousand, three hundred seventy-one".