90406860409 has 4 divisors (see below), whose sum is σ = 95165116240. Its totient is φ = 85648604580.

The previous prime is 90406860391. The next prime is 90406860437.

90406860409 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 90406860409 - 2⁵ = 90406860377 is a prime.

It is a super-3 number, since 3×90406860409³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90406860499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2379127887 + ... + 2379127924.

It is an arithmetic number, because the mean of its divisors is an integer number (23791279060).

Almost surely, 2^90406860409 is an apocalyptic number.

It is an amenable number.

90406860409 is a deficient number, since it is larger than the sum of its proper divisors (4758255831).

90406860409 is a wasteful number, since it uses less digits than its factorization.

90406860409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758255830.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 90406860409 in words is "ninety billion, four hundred six million, eight hundred sixty thousand, four hundred nine".