90242071 has 2 divisors, whose sum is σ = 90242072. Its totient is φ = 90242070.

The previous prime is 90242063. The next prime is 90242123. The reversal of 90242071 is 17024209.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90242071 - 2³ = 90242063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90212071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45121035 + 45121036.

It is an arithmetic number, because the mean of its divisors is an integer number (45121036).

Almost surely, 2^90242071 is an apocalyptic number.

90242071 is a deficient number, since it is larger than the sum of its proper divisors (1).

90242071 is an equidigital number, since it uses as much as digits as its factorization.

90242071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 90242071 is about 9499.5826750442. The cubic root of 90242071 is about 448.5418994614.

The spelling of 90242071 in words is "ninety million, two hundred forty-two thousand, seventy-one".