90303947 has 2 divisors, whose sum is σ = 90303948. Its totient is φ = 90303946.

The previous prime is 90303901. The next prime is 90303953. The reversal of 90303947 is 74930309.

It is a strong prime.

It is an emirp because it is prime and its reverse (74930309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90303947 - 2⁸ = 90303691 is a prime.

It is not a weakly prime, because it can be changed into another prime (90303047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45151973 + 45151974.

It is an arithmetic number, because the mean of its divisors is an integer number (45151974).

Almost surely, 2^90303947 is an apocalyptic number.

90303947 is a deficient number, since it is larger than the sum of its proper divisors (1).

90303947 is an equidigital number, since it uses as much as digits as its factorization.

90303947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 90303947 is about 9502.8388916155. The cubic root of 90303947 is about 448.6443928157.

The spelling of 90303947 in words is "ninety million, three hundred three thousand, nine hundred forty-seven".