90690203 has 2 divisors, whose sum is σ = 90690204. Its totient is φ = 90690202.

The previous prime is 90690181. The next prime is 90690209. The reversal of 90690203 is 30209609.

It is a strong prime.

It is an emirp because it is prime and its reverse (30209609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90690203 - 2⁸ = 90689947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90690209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45345101 + 45345102.

It is an arithmetic number, because the mean of its divisors is an integer number (45345102).

Almost surely, 2^90690203 is an apocalyptic number.

90690203 is a deficient number, since it is larger than the sum of its proper divisors (1).

90690203 is an equidigital number, since it uses as much as digits as its factorization.

90690203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 90690203 is about 9523.1403958988. The cubic root of 90690203 is about 449.2831434170.

The spelling of 90690203 in words is "ninety million, six hundred ninety thousand, two hundred three".