90646687 has 2 divisors, whose sum is σ = 90646688. Its totient is φ = 90646686.

The previous prime is 90646681. The next prime is 90646711. The reversal of 90646687 is 78664609.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90646687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90646681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45323343 + 45323344.

It is an arithmetic number, because the mean of its divisors is an integer number (45323344).

Almost surely, 2^90646687 is an apocalyptic number.

90646687 is a deficient number, since it is larger than the sum of its proper divisors (1).

90646687 is an equidigital number, since it uses as much as digits as its factorization.

90646687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 90646687 is about 9520.8553712363. The cubic root of 90646687 is about 449.2112718788.

It can be divided in two parts, 9064 and 6687, that added together give a palindrome (15751).

The spelling of 90646687 in words is "ninety million, six hundred forty-six thousand, six hundred eighty-seven".