90099943 has 2 divisors, whose sum is σ = 90099944. Its totient is φ = 90099942.

The previous prime is 90099941. The next prime is 90099953. The reversal of 90099943 is 34999009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90099943 - 2¹ = 90099941 is a prime.

Together with 90099941, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90099943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90099941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45049971 + 45049972.

It is an arithmetic number, because the mean of its divisors is an integer number (45049972).

Almost surely, 2^90099943 is an apocalyptic number.

90099943 is a deficient number, since it is larger than the sum of its proper divisors (1).

90099943 is an equidigital number, since it uses as much as digits as its factorization.

90099943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 90099943 is about 9492.0989775708. The cubic root of 90099943 is about 448.3062966365.

The spelling of 90099943 in words is "ninety million, ninety-nine thousand, nine hundred forty-three".