90412108069 has 4 divisors (see below), whose sum is σ = 90413927244. Its totient is φ = 90410288896.

The previous prime is 90412108027. The next prime is 90412108109. The reversal of 90412108069 is 96080121409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96080121409 = 23 ⋅4177396583.

It can be written as a sum of positive squares in 2 ways, for example, as 39668688900 + 50743419169 = 199170^2 + 225263^2 .

It is a cyclic number.

It is not a de Polignac number, because 90412108069 - 2⁹ = 90412107557 is a prime.

It is a super-2 number, since 2×90412108069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90412108669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832882 + ... + 935155.

It is an arithmetic number, because the mean of its divisors is an integer number (22603481811).

Almost surely, 2^90412108069 is an apocalyptic number.

It is an amenable number.

90412108069 is a deficient number, since it is larger than the sum of its proper divisors (1819175).

90412108069 is a wasteful number, since it uses less digits than its factorization.

90412108069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819174.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 90412108069 in words is "ninety billion, four hundred twelve million, one hundred eight thousand, sixty-nine".