90690219 has 32 divisors (see below), whose sum is σ = 144023040. Its totient is φ = 56254176.

The previous prime is 90690209. The next prime is 90690227. The reversal of 90690219 is 91209609.

It is not a de Polignac number, because 90690219 - 2⁴ = 90690203 is a prime.

It is a super-2 number, since 2×90690219² = 16449431644535922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90690209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21004 + ... + 24950.

It is an arithmetic number, because the mean of its divisors is an integer number (4500720).

Almost surely, 2^90690219 is an apocalyptic number.

90690219 is a deficient number, since it is larger than the sum of its proper divisors (53332821).

90690219 is a wasteful number, since it uses less digits than its factorization.

90690219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016 (or 4010 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 90690219 is about 9523.1412359578. The cubic root of 90690219 is about 449.2831698386.

It can be divided in two parts, 90690 and 219, that added together give a palindrome (90909).

The spelling of 90690219 in words is "ninety million, six hundred ninety thousand, two hundred nineteen".