90939019 has 2 divisors, whose sum is σ = 90939020. Its totient is φ = 90939018.

The previous prime is 90939011. The next prime is 90939049. The reversal of 90939019 is 91093909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90939019 - 2³ = 90939011 is a prime.

It is a super-2 number, since 2×90939019² = 16539810353364722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90939011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45469509 + 45469510.

It is an arithmetic number, because the mean of its divisors is an integer number (45469510).

Almost surely, 2^90939019 is an apocalyptic number.

90939019 is a deficient number, since it is larger than the sum of its proper divisors (1).

90939019 is an equidigital number, since it uses as much as digits as its factorization.

90939019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 90939019 is about 9536.1952056363. The cubic root of 90939019 is about 449.6936499272.

The spelling of 90939019 in words is "ninety million, nine hundred thirty-nine thousand, nineteen".