90042443 has 2 divisors, whose sum is σ = 90042444. Its totient is φ = 90042442.

The previous prime is 90042427. The next prime is 90042461. The reversal of 90042443 is 34424009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90042443 - 2⁴ = 90042427 is a prime.

It is not a weakly prime, because it can be changed into another prime (90042943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45021221 + 45021222.

It is an arithmetic number, because the mean of its divisors is an integer number (45021222).

Almost surely, 2^90042443 is an apocalyptic number.

90042443 is a deficient number, since it is larger than the sum of its proper divisors (1).

90042443 is an equidigital number, since it uses as much as digits as its factorization.

90042443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 90042443 is about 9489.0696593502. The cubic root of 90042443 is about 448.2109096076.

The spelling of 90042443 in words is "ninety million, forty-two thousand, four hundred forty-three".