90262661 has 2 divisors, whose sum is σ = 90262662. Its totient is φ = 90262660.

The previous prime is 90262637. The next prime is 90262663. The reversal of 90262661 is 16626209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 14485636 = 8705^2 + 3806^2 .

It is a cyclic number.

It is not a de Polignac number, because 90262661 - 2²⁶ = 23153797 is a prime.

Together with 90262663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90262663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45131330 + 45131331.

It is an arithmetic number, because the mean of its divisors is an integer number (45131331).

Almost surely, 2^90262661 is an apocalyptic number.

It is an amenable number.

90262661 is a deficient number, since it is larger than the sum of its proper divisors (1).

90262661 is an equidigital number, since it uses as much as digits as its factorization.

90262661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 90262661 is about 9500.6663450518. Note that the first 3 decimals coincide. The cubic root of 90262661 is about 448.5760105853.

The spelling of 90262661 in words is "ninety million, two hundred sixty-two thousand, six hundred sixty-one".