90043669 has 2 divisors, whose sum is σ = 90043670. Its totient is φ = 90043668.

The previous prime is 90043619. The next prime is 90043673. The reversal of 90043669 is 96634009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 8773444 = 9015^2 + 2962^2 .

It is a cyclic number.

It is not a de Polignac number, because 90043669 - 2⁹ = 90043157 is a prime.

It is a super-2 number, since 2×90043669² = 16215724653963122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90043619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45021834 + 45021835.

It is an arithmetic number, because the mean of its divisors is an integer number (45021835).

Almost surely, 2^90043669 is an apocalyptic number.

It is an amenable number.

90043669 is a deficient number, since it is larger than the sum of its proper divisors (1).

90043669 is an equidigital number, since it uses as much as digits as its factorization.

90043669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 90043669 is about 9489.1342597731. The cubic root of 90043669 is about 448.2129438486.

The spelling of 90043669 in words is "ninety million, forty-three thousand, six hundred sixty-nine".