981678207 has 4 divisors (see below), whose sum is σ = 1308904280. Its totient is φ = 654452136.

The previous prime is 981678179. The next prime is 981678233. The reversal of 981678207 is 702876189.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 981678207 - 2⁷ = 981678079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981178207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163613032 + ... + 163613037.

It is an arithmetic number, because the mean of its divisors is an integer number (327226070).

Almost surely, 2^981678207 is an apocalyptic number.

981678207 is a deficient number, since it is larger than the sum of its proper divisors (327226073).

981678207 is a wasteful number, since it uses less digits than its factorization.

981678207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327226072.

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 981678207 is about 31331.7443976552. The cubic root of 981678207 is about 993.8550526337.

The spelling of 981678207 in words is "nine hundred eighty-one million, six hundred seventy-eight thousand, two hundred seven".