90430081 has 4 divisors (see below), whose sum is σ = 103348672. Its totient is φ = 77511492.

The previous prime is 90430079. The next prime is 90430097. The reversal of 90430081 is 18003409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18003409 = 1327 ⋅13567.

It is a cyclic number.

It is not a de Polignac number, because 90430081 - 2¹ = 90430079 is a prime.

It is a super-2 number, since 2×90430081² = 16355199099333122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90430981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6459285 + ... + 6459298.

It is an arithmetic number, because the mean of its divisors is an integer number (25837168).

Almost surely, 2^90430081 is an apocalyptic number.

It is an amenable number.

90430081 is a deficient number, since it is larger than the sum of its proper divisors (12918591).

90430081 is a wasteful number, since it uses less digits than its factorization.

90430081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12918590.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 90430081 is about 9509.4732241066. The cubic root of 90430081 is about 448.8531802375.

The spelling of 90430081 in words is "ninety million, four hundred thirty thousand, eighty-one".