90257311 has 2 divisors, whose sum is σ = 90257312. Its totient is φ = 90257310.

The previous prime is 90257291. The next prime is 90257327. The reversal of 90257311 is 11375209.

It is a strong prime.

It is an emirp because it is prime and its reverse (11375209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90257311 - 2⁹ = 90256799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90257311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90257351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45128655 + 45128656.

It is an arithmetic number, because the mean of its divisors is an integer number (45128656).

Almost surely, 2^90257311 is an apocalyptic number.

90257311 is a deficient number, since it is larger than the sum of its proper divisors (1).

90257311 is an equidigital number, since it uses as much as digits as its factorization.

90257311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 90257311 is about 9500.3847816812. The cubic root of 90257311 is about 448.5671478247.

The spelling of 90257311 in words is "ninety million, two hundred fifty-seven thousand, three hundred eleven".