890656087 has 2 divisors, whose sum is σ = 890656088. Its totient is φ = 890656086.

The previous prime is 890656057. The next prime is 890656121. The reversal of 890656087 is 780656098.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890656087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 890656087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890656007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445328043 + 445328044.

It is an arithmetic number, because the mean of its divisors is an integer number (445328044).

Almost surely, 2^890656087 is an apocalyptic number.

890656087 is a deficient number, since it is larger than the sum of its proper divisors (1).

890656087 is an equidigital number, since it uses as much as digits as its factorization.

890656087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 890656087 is about 29843.8617976964. The cubic root of 890656087 is about 962.1364769210.

The spelling of 890656087 in words is "eight hundred ninety million, six hundred fifty-six thousand, eighty-seven".