90878617 has 8 divisors (see below), whose sum is σ = 96919200. Its totient is φ = 84915264.

The previous prime is 90878597. The next prime is 90878633. The reversal of 90878617 is 71687809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90878617 is a prime.

It is a super-3 number, since 3×90878617³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90878657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16867 + ... + 21592.

It is an arithmetic number, because the mean of its divisors is an integer number (12114900).

Almost surely, 2^90878617 is an apocalyptic number.

It is an amenable number.

90878617 is a deficient number, since it is larger than the sum of its proper divisors (6040583).

90878617 is a wasteful number, since it uses less digits than its factorization.

90878617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38615.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 90878617 is about 9533.0276932358. The cubic root of 90878617 is about 449.5940652012.

The spelling of 90878617 in words is "ninety million, eight hundred seventy-eight thousand, six hundred seventeen".