90816287 has 2 divisors, whose sum is σ = 90816288. Its totient is φ = 90816286.

The previous prime is 90816269. The next prime is 90816317. The reversal of 90816287 is 78261809.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90816287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90816587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45408143 + 45408144.

It is an arithmetic number, because the mean of its divisors is an integer number (45408144).

Almost surely, 2^90816287 is an apocalyptic number.

90816287 is a deficient number, since it is larger than the sum of its proper divisors (1).

90816287 is an equidigital number, since it uses as much as digits as its factorization.

90816287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 90816287 is about 9529.7579717430. The cubic root of 90816287 is about 449.4912555117.

The spelling of 90816287 in words is "ninety million, eight hundred sixteen thousand, two hundred eighty-seven".