90947 has 2 divisors, whose sum is σ = 90948. Its totient is φ = 90946.

The previous prime is 90931. The next prime is 90971. The reversal of 90947 is 74909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90947 - 2⁴ = 90931 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90947.

It is not a weakly prime, because it can be changed into another prime (90907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45473 + 45474.

It is an arithmetic number, because the mean of its divisors is an integer number (45474).

2⁹⁰⁹⁴⁷ is an apocalyptic number.

90947 is a deficient number, since it is larger than the sum of its proper divisors (1).

90947 is an equidigital number, since it uses as much as digits as its factorization.

90947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 90947 is about 301.5742031408. The cubic root of 90947 is about 44.9706804897.

The spelling of 90947 in words is "ninety thousand, nine hundred forty-seven".