90041999 has 2 divisors, whose sum is σ = 90042000. Its totient is φ = 90041998.

The previous prime is 90041981. The next prime is 90042023. The reversal of 90041999 is 99914009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90041999 - 2¹⁶ = 89976463 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90047999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45020999 + 45021000.

It is an arithmetic number, because the mean of its divisors is an integer number (45021000).

Almost surely, 2^90041999 is an apocalyptic number.

90041999 is a deficient number, since it is larger than the sum of its proper divisors (1).

90041999 is an equidigital number, since it uses as much as digits as its factorization.

90041999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 90041999 is about 9489.0462639825. The cubic root of 90041999 is about 448.2101728959.

The spelling of 90041999 in words is "ninety million, forty-one thousand, nine hundred ninety-nine".