90781076 has 6 divisors (see below), whose sum is σ = 158866890. Its totient is φ = 45390536.

The previous prime is 90781063. The next prime is 90781087. The reversal of 90781076 is 67018709.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 13868176 = 8770^2 + 3724^2 .

It is an alternating number because its digits alternate between odd and even.

It is a pancake number, because a pancake can be divided into 90781076 parts by 13474 straight cuts.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11347631 + ... + 11347638.

It is an arithmetic number, because the mean of its divisors is an integer number (26477815).

Almost surely, 2^90781076 is an apocalyptic number.

It is an amenable number.

90781076 is a deficient number, since it is larger than the sum of its proper divisors (68085814).

90781076 is a wasteful number, since it uses less digits than its factorization.

90781076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22695273 (or 22695271 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 90781076 is about 9527.9103690159. The cubic root of 90781076 is about 449.4331562323.

The spelling of 90781076 in words is "ninety million, seven hundred eighty-one thousand, seventy-six".