90609787 has 2 divisors, whose sum is σ = 90609788. Its totient is φ = 90609786.

The previous prime is 90609769. The next prime is 90609793. The reversal of 90609787 is 78790609.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90609787 is a prime.

It is not a weakly prime, because it can be changed into another prime (90609767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45304893 + 45304894.

It is an arithmetic number, because the mean of its divisors is an integer number (45304894).

Almost surely, 2^90609787 is an apocalyptic number.

90609787 is a deficient number, since it is larger than the sum of its proper divisors (1).

90609787 is an equidigital number, since it uses as much as digits as its factorization.

90609787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 90609787 is about 9518.9173228892. The cubic root of 90609787 is about 449.1503093800.

The spelling of 90609787 in words is "ninety million, six hundred nine thousand, seven hundred eighty-seven".