90074863 has 2 divisors, whose sum is σ = 90074864. Its totient is φ = 90074862.

The previous prime is 90074861. The next prime is 90074903. The reversal of 90074863 is 36847009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90074863 - 2¹ = 90074861 is a prime.

It is a super-2 number, since 2×90074863² = 16226961888937538, which contains 22 as substring.

Together with 90074861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90074861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45037431 + 45037432.

It is an arithmetic number, because the mean of its divisors is an integer number (45037432).

Almost surely, 2^90074863 is an apocalyptic number.

90074863 is a deficient number, since it is larger than the sum of its proper divisors (1).

90074863 is an equidigital number, since it uses as much as digits as its factorization.

90074863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 90074863 is about 9490.7777868834. Note that the first 4 decimals coincide. The cubic root of 90074863 is about 448.2646962945.

The spelling of 90074863 in words is "ninety million, seventy-four thousand, eight hundred sixty-three".