90788709 has 16 divisors (see below), whose sum is σ = 132231744. Its totient is φ = 54950400.

The previous prime is 90788701. The next prime is 90788717.

90788709 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (90788701) and next prime (90788717).

It is not a de Polignac number, because 90788709 - 2³ = 90788701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90788701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33717 + ... + 36309.

It is an arithmetic number, because the mean of its divisors is an integer number (8264484).

Almost surely, 2^90788709 is an apocalyptic number.

It is an amenable number.

90788709 is a deficient number, since it is larger than the sum of its proper divisors (41443035).

90788709 is a wasteful number, since it uses less digits than its factorization.

90788709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 90788709 is about 9528.3109206197. The cubic root of 90788709 is about 449.4457522023.

The spelling of 90788709 in words is "ninety million, seven hundred eighty-eight thousand, seven hundred nine".