90867947 has 2 divisors, whose sum is σ = 90867948. Its totient is φ = 90867946.

The previous prime is 90867943. The next prime is 90867949. The reversal of 90867947 is 74976809.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (74976809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90867947 - 2² = 90867943 is a prime.

Together with 90867949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90867895 and 90867904.

It is not a weakly prime, because it can be changed into another prime (90867943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45433973 + 45433974.

It is an arithmetic number, because the mean of its divisors is an integer number (45433974).

Almost surely, 2^90867947 is an apocalyptic number.

90867947 is a deficient number, since it is larger than the sum of its proper divisors (1).

90867947 is an equidigital number, since it uses as much as digits as its factorization.

90867947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 90867947 is about 9532.4680434817. The cubic root of 90867947 is about 449.5764689959.

The spelling of 90867947 in words is "ninety million, eight hundred sixty-seven thousand, nine hundred forty-seven".