90153893 has 2 divisors, whose sum is σ = 90153894. Its totient is φ = 90153892.

The previous prime is 90153857. The next prime is 90153977. The reversal of 90153893 is 39835109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85414564 + 4739329 = 9242^2 + 2177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90153893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90153823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45076946 + 45076947.

It is an arithmetic number, because the mean of its divisors is an integer number (45076947).

Almost surely, 2^90153893 is an apocalyptic number.

It is an amenable number.

90153893 is a deficient number, since it is larger than the sum of its proper divisors (1).

90153893 is an equidigital number, since it uses as much as digits as its factorization.

90153893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 90153893 is about 9494.9403894917. The cubic root of 90153893 is about 448.3957576584.

The spelling of 90153893 in words is "ninety million, one hundred fifty-three thousand, eight hundred ninety-three".