90681277 has 2 divisors, whose sum is σ = 90681278. Its totient is φ = 90681276.

The previous prime is 90681233. The next prime is 90681287. The reversal of 90681277 is 77218609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71723961 + 18957316 = 8469^2 + 4354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90681277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90681287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45340638 + 45340639.

It is an arithmetic number, because the mean of its divisors is an integer number (45340639).

Almost surely, 2^90681277 is an apocalyptic number.

It is an amenable number.

90681277 is a deficient number, since it is larger than the sum of its proper divisors (1).

90681277 is an equidigital number, since it uses as much as digits as its factorization.

90681277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 90681277 is about 9522.6717364404. The cubic root of 90681277 is about 449.2684030049.

The spelling of 90681277 in words is "ninety million, six hundred eighty-one thousand, two hundred seventy-seven".