90069859 has 12 divisors (see below), whose sum is σ = 104828472. Its totient is φ = 77063360.

The previous prime is 90069851. The next prime is 90069883. The reversal of 90069859 is 95896009.

It is a happy number.

It is not a de Polignac number, because 90069859 - 2³ = 90069851 is a prime.

It is a super-2 number, since 2×90069859² = 16225159000559762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90069851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19837 + ... + 23950.

It is an arithmetic number, because the mean of its divisors is an integer number (8735706).

Almost surely, 2^90069859 is an apocalyptic number.

90069859 is a deficient number, since it is larger than the sum of its proper divisors (14758613).

90069859 is a wasteful number, since it uses less digits than its factorization.

90069859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43826 (or 43815 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 90069859 is about 9490.5141588852. The cubic root of 90069859 is about 448.2563952065.

The spelling of 90069859 in words is "ninety million, sixty-nine thousand, eight hundred fifty-nine".