90087669959 has 4 divisors (see below), whose sum is σ = 102957337104. Its totient is φ = 77218002816.

The previous prime is 90087669937. The next prime is 90087669961. The reversal of 90087669959 is 95996678009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90087669959 is a prime.

It is a super-2 number, since 2×90087669959² (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 (90087669929) 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, 6434833562 + ... + 6434833575.

It is an arithmetic number, because the mean of its divisors is an integer number (25739334276).

Almost surely, 2^90087669959 is an apocalyptic number.

90087669959 is a deficient number, since it is larger than the sum of its proper divisors (12869667145).

90087669959 is a wasteful number, since it uses less digits than its factorization.

90087669959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12869667144.

The product of its (nonzero) digits is 66134880, while the sum is 68.

The spelling of 90087669959 in words is "ninety billion, eighty-seven million, six hundred sixty-nine thousand, nine hundred fifty-nine".