90889247 has 2 divisors, whose sum is σ = 90889248. Its totient is φ = 90889246.

The previous prime is 90889231. The next prime is 90889343. The reversal of 90889247 is 74298809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90889247 - 2⁴ = 90889231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90889147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45444623 + 45444624.

It is an arithmetic number, because the mean of its divisors is an integer number (45444624).

Almost surely, 2^90889247 is an apocalyptic number.

90889247 is a deficient number, since it is larger than the sum of its proper divisors (1).

90889247 is an equidigital number, since it uses as much as digits as its factorization.

90889247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 90889247 is about 9533.5852122903. The cubic root of 90889247 is about 449.6115940720.

The spelling of 90889247 in words is "ninety million, eight hundred eighty-nine thousand, two hundred forty-seven".