90207070209 has 12 divisors (see below), whose sum is σ = 131589192852. Its totient is φ = 59542620000.

The previous prime is 90207070207. The next prime is 90207070211.

90207070209 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (90207070207) and next prime (90207070211).

It can be written as a sum of positive squares in 2 ways, for example, as 74568317184 + 15638753025 = 273072^2 + 125055^2 .

It is not a de Polignac number, because 90207070209 - 2¹ = 90207070207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90207070207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49617942 + ... + 49619759.

It is an arithmetic number, because the mean of its divisors is an integer number (10965766071).

Almost surely, 2^90207070209 is an apocalyptic number.

It is an amenable number.

90207070209 is a deficient number, since it is larger than the sum of its proper divisors (41382122643).

90207070209 is a wasteful number, since it uses less digits than its factorization.

90207070209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99237808 (or 99237805 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

It can be divided in two parts, 902070 and 70209, that added together give a palindrome (972279).

The spelling of 90207070209 in words is "ninety billion, two hundred seven million, seventy thousand, two hundred nine".