890287087649 has 2 divisors, whose sum is σ = 890287087650. Its totient is φ = 890287087648.

The previous prime is 890287087633. The next prime is 890287087787. The reversal of 890287087649 is 946780782098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636907744225 + 253379343424 = 798065^2 + 503368^2 .

It is a cyclic number.

It is not a de Polignac number, because 890287087649 - 2⁴ = 890287087633 is a prime.

It is a super-2 number, since 2×890287087649² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (890287047649) 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, 445143543824 + 445143543825.

It is an arithmetic number, because the mean of its divisors is an integer number (445143543825).

Almost surely, 2^890287087649 is an apocalyptic number.

It is an amenable number.

890287087649 is a deficient number, since it is larger than the sum of its proper divisors (1).

890287087649 is an equidigital number, since it uses as much as digits as its factorization.

890287087649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97542144, while the sum is 68.

The spelling of 890287087649 in words is "eight hundred ninety billion, two hundred eighty-seven million, eighty-seven thousand, six hundred forty-nine".