90802819 has 2 divisors, whose sum is σ = 90802820. Its totient is φ = 90802818.

The previous prime is 90802807. The next prime is 90802849. The reversal of 90802819 is 91820809.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90802819 is a prime.

It is a super-2 number, since 2×90802819² = 16490303876693522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90802849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45401409 + 45401410.

It is an arithmetic number, because the mean of its divisors is an integer number (45401410).

Almost surely, 2^90802819 is an apocalyptic number.

90802819 is a deficient number, since it is larger than the sum of its proper divisors (1).

90802819 is an equidigital number, since it uses as much as digits as its factorization.

90802819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 90802819 is about 9529.0513168940. The cubic root of 90802819 is about 449.4690346535.

The spelling of 90802819 in words is "ninety million, eight hundred two thousand, eight hundred nineteen".