90478273 has 2 divisors, whose sum is σ = 90478274. Its totient is φ = 90478272.

The previous prime is 90478259. The next prime is 90478303. The reversal of 90478273 is 37287409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64192144 + 26286129 = 8012^2 + 5127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90478273 is a prime.

It is not a weakly prime, because it can be changed into another prime (90478253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45239136 + 45239137.

It is an arithmetic number, because the mean of its divisors is an integer number (45239137).

Almost surely, 2^90478273 is an apocalyptic number.

It is an amenable number.

90478273 is a deficient number, since it is larger than the sum of its proper divisors (1).

90478273 is an equidigital number, since it uses as much as digits as its factorization.

90478273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 90478273 is about 9512.0067809059. The cubic root of 90478273 is about 448.9329003587.

The spelling of 90478273 in words is "ninety million, four hundred seventy-eight thousand, two hundred seventy-three".