981869687 has 2 divisors, whose sum is σ = 981869688. Its totient is φ = 981869686.

The previous prime is 981869683. The next prime is 981869717. The reversal of 981869687 is 786968189.

981869687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981869687 - 2² = 981869683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981869683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490934843 + 490934844.

It is an arithmetic number, because the mean of its divisors is an integer number (490934844).

Almost surely, 2^981869687 is an apocalyptic number.

981869687 is a deficient number, since it is larger than the sum of its proper divisors (1).

981869687 is an equidigital number, since it uses as much as digits as its factorization.

981869687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 62.

The square root of 981869687 is about 31334.7999355349. The cubic root of 981869687 is about 993.9196668126.

The spelling of 981869687 in words is "nine hundred eighty-one million, eight hundred sixty-nine thousand, six hundred eighty-seven".