90485261 has 2 divisors, whose sum is σ = 90485262. Its totient is φ = 90485260.

The previous prime is 90485231. The next prime is 90485267. The reversal of 90485261 is 16258409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75516100 + 14969161 = 8690^2 + 3869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90485261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90485267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45242630 + 45242631.

It is an arithmetic number, because the mean of its divisors is an integer number (45242631).

Almost surely, 2^90485261 is an apocalyptic number.

It is an amenable number.

90485261 is a deficient number, since it is larger than the sum of its proper divisors (1).

90485261 is an equidigital number, since it uses as much as digits as its factorization.

90485261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 90485261 is about 9512.3740990354. The cubic root of 90485261 is about 448.9444576908.

The spelling of 90485261 in words is "ninety million, four hundred eighty-five thousand, two hundred sixty-one".