90750661 has 2 divisors, whose sum is σ = 90750662. Its totient is φ = 90750660.

The previous prime is 90750619. The next prime is 90750679. The reversal of 90750661 is 16605709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90060100 + 690561 = 9490^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 90750661 - 2¹¹ = 90748613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90753661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45375330 + 45375331.

It is an arithmetic number, because the mean of its divisors is an integer number (45375331).

Almost surely, 2^90750661 is an apocalyptic number.

It is an amenable number.

90750661 is a deficient number, since it is larger than the sum of its proper divisors (1).

90750661 is an equidigital number, since it uses as much as digits as its factorization.

90750661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 90750661 is about 9526.3141350682. The cubic root of 90750661 is about 449.3829584123.

The spelling of 90750661 in words is "ninety million, seven hundred fifty thousand, six hundred sixty-one".