90706009 has 4 divisors (see below), whose sum is σ = 90743760. Its totient is φ = 90668260.

The previous prime is 90706003. The next prime is 90706013. The reversal of 90706009 is 90060709.

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: 90060709 = 23 ⋅3915683.

It is a cyclic number.

It is not a de Polignac number, because 90706009 - 2³ = 90706001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90706001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15007 + ... + 20164.

It is an arithmetic number, because the mean of its divisors is an integer number (22685940).

Almost surely, 2^90706009 is an apocalyptic number.

It is an amenable number.

90706009 is a deficient number, since it is larger than the sum of its proper divisors (37751).

90706009 is a wasteful number, since it uses less digits than its factorization.

90706009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37750.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 90706009 is about 9523.9702330488. The cubic root of 90706009 is about 449.3092431008.

The spelling of 90706009 in words is "ninety million, seven hundred six thousand, nine".