90913843 has 2 divisors, whose sum is σ = 90913844. Its totient is φ = 90913842.

The previous prime is 90913831. The next prime is 90913861. The reversal of 90913843 is 34831909.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90913843 is a prime.

It is not a weakly prime, because it can be changed into another prime (90913813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45456921 + 45456922.

It is an arithmetic number, because the mean of its divisors is an integer number (45456922).

Almost surely, 2^90913843 is an apocalyptic number.

90913843 is a deficient number, since it is larger than the sum of its proper divisors (1).

90913843 is an equidigital number, since it uses as much as digits as its factorization.

90913843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 90913843 is about 9534.8750909490. The cubic root of 90913843 is about 449.6521476385.

The spelling of 90913843 in words is "ninety million, nine hundred thirteen thousand, eight hundred forty-three".