90412108669 has 2 divisors, whose sum is σ = 90412108670. Its totient is φ = 90412108668.

The previous prime is 90412108667. The next prime is 90412108687. The reversal of 90412108669 is 96680121409.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90323089444 + 89019225 = 300538^2 + 9435^2 .

It is an emirp because it is prime and its reverse (96680121409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90412108669 - 2¹ = 90412108667 is a prime.

It is a super-2 number, since 2×90412108669² (a number of 23 digits) contains 22 as substring.

Together with 90412108667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90412108667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45206054334 + 45206054335.

It is an arithmetic number, because the mean of its divisors is an integer number (45206054335).

Almost surely, 2^90412108669 is an apocalyptic number.

It is an amenable number.

90412108669 is a deficient number, since it is larger than the sum of its proper divisors (1).

90412108669 is an equidigital number, since it uses as much as digits as its factorization.

90412108669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 90412108669 in words is "ninety billion, four hundred twelve million, one hundred eight thousand, six hundred sixty-nine".