90978727 has 8 divisors (see below), whose sum is σ = 104227200. Its totient is φ = 77793144.

The previous prime is 90978689. The next prime is 90978733. The reversal of 90978727 is 72787909.

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

It is a cyclic number.

It is not a de Polignac number, because 90978727 - 2⁷ = 90978599 is a prime.

It is a super-5 number, since 5×90978727⁵ (a number of 41 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90978787) 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, 12577 + ... + 18442.

It is an arithmetic number, because the mean of its divisors is an integer number (13028400).

Almost surely, 2^90978727 is an apocalyptic number.

90978727 is a deficient number, since it is larger than the sum of its proper divisors (13248473).

90978727 is a wasteful number, since it uses less digits than its factorization.

90978727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31445.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 90978727 is about 9538.2769408316. The cubic root of 90978727 is about 449.7590924523.

The spelling of 90978727 in words is "ninety million, nine hundred seventy-eight thousand, seven hundred twenty-seven".