90259849 has 2 divisors, whose sum is σ = 90259850. Its totient is φ = 90259848.

The previous prime is 90259831. The next prime is 90259859. The reversal of 90259849 is 94895209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81000000 + 9259849 = 9000^2 + 3043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90259849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90259799 and 90259808.

It is not a weakly prime, because it can be changed into another prime (90259859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45129924 + 45129925.

It is an arithmetic number, because the mean of its divisors is an integer number (45129925).

Almost surely, 2^90259849 is an apocalyptic number.

It is an amenable number.

90259849 is a deficient number, since it is larger than the sum of its proper divisors (1).

90259849 is an equidigital number, since it uses as much as digits as its factorization.

90259849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 90259849 is about 9500.5183542794. The cubic root of 90259849 is about 448.5713522957.

The spelling of 90259849 in words is "ninety million, two hundred fifty-nine thousand, eight hundred forty-nine".