698315887 has 2 divisors, whose sum is σ = 698315888. Its totient is φ = 698315886.

The previous prime is 698315879. The next prime is 698315909. The reversal of 698315887 is 788513896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 698315887 - 2³ = 698315879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698315867) 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, 349157943 + 349157944.

It is an arithmetic number, because the mean of its divisors is an integer number (349157944).

Almost surely, 2^698315887 is an apocalyptic number.

698315887 is a deficient number, since it is larger than the sum of its proper divisors (1).

698315887 is an equidigital number, since it uses as much as digits as its factorization.

698315887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 55.

The square root of 698315887 is about 26425.6672006593. The cubic root of 698315887 is about 887.1913677089.

The spelling of 698315887 in words is "six hundred ninety-eight million, three hundred fifteen thousand, eight hundred eighty-seven".