90630091 has 2 divisors, whose sum is σ = 90630092. Its totient is φ = 90630090.

The previous prime is 90630083. The next prime is 90630101. The reversal of 90630091 is 19003609.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90630091 - 2³ = 90630083 is a prime.

It is not a weakly prime, because it can be changed into another prime (90630031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45315045 + 45315046.

It is an arithmetic number, because the mean of its divisors is an integer number (45315046).

Almost surely, 2^90630091 is an apocalyptic number.

90630091 is a deficient number, since it is larger than the sum of its proper divisors (1).

90630091 is an equidigital number, since it uses as much as digits as its factorization.

90630091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 90630091 is about 9519.9837709946. The cubic root of 90630091 is about 449.1838556708.

The spelling of 90630091 in words is "ninety million, six hundred thirty thousand, ninety-one".