90780807 has 8 divisors (see below), whose sum is σ = 130351984. Its totient is φ = 55865088.

The previous prime is 90780797. The next prime is 90780887. The reversal of 90780807 is 70808709.

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

It is not a de Polignac number, because 90780807 - 2⁴ = 90780791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2327713 = 90780807 / (9 + 0 + 7 + 8 + 0 + 8 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163818 + ... + 1163895.

It is an arithmetic number, because the mean of its divisors is an integer number (16293998).

Almost surely, 2^90780807 is an apocalyptic number.

90780807 is a deficient number, since it is larger than the sum of its proper divisors (39571177).

90780807 is a wasteful number, since it uses less digits than its factorization.

90780807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327729.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 90780807 is about 9527.8962525838. The cubic root of 90780807 is about 449.4327123159.

It can be divided in two parts, 90780 and 807, that multiplied together give a triangular number (73259460 = T₁₂₁₀₄).

The spelling of 90780807 in words is "ninety million, seven hundred eighty thousand, eight hundred seven".