90700669 has 2 divisors, whose sum is σ = 90700670. Its totient is φ = 90700668.

The previous prime is 90700639. The next prime is 90700679. The reversal of 90700669 is 96600709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 36457444 = 7365^2 + 6038^2 .

It is an emirp because it is prime and its reverse (96600709) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90700669 is a prime.

It is a super-2 number, since 2×90700669² = 16453222714095122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90700639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45350334 + 45350335.

It is an arithmetic number, because the mean of its divisors is an integer number (45350335).

Almost surely, 2^90700669 is an apocalyptic number.

It is an amenable number.

90700669 is a deficient number, since it is larger than the sum of its proper divisors (1).

90700669 is an equidigital number, since it uses as much as digits as its factorization.

90700669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 90700669 is about 9523.6898836533. The cubic root of 90700669 is about 449.3004257561.

The spelling of 90700669 in words is "ninety million, seven hundred thousand, six hundred sixty-nine".