90478259 has 2 divisors, whose sum is σ = 90478260. Its totient is φ = 90478258.

The previous prime is 90478253. The next prime is 90478273. The reversal of 90478259 is 95287409.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90478259 is a prime.

It is a Chen 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, 45239129 + 45239130.

It is an arithmetic number, because the mean of its divisors is an integer number (45239130).

Almost surely, 2^90478259 is an apocalyptic number.

90478259 is a deficient number, since it is larger than the sum of its proper divisors (1).

90478259 is an equidigital number, since it uses as much as digits as its factorization.

90478259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 90478259 is about 9512.0060449939. The cubic root of 90478259 is about 448.9328772037.

The spelling of 90478259 in words is "ninety million, four hundred seventy-eight thousand, two hundred fifty-nine".