981131206 has 8 divisors (see below), whose sum is σ = 1605487464. Its totient is φ = 445968720.

The previous prime is 981131153. The next prime is 981131209. The reversal of 981131206 is 602131189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×981131206³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981131209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22298415 + ... + 22298458.

It is an arithmetic number, because the mean of its divisors is an integer number (200685933).

Almost surely, 2^981131206 is an apocalyptic number.

981131206 is a deficient number, since it is larger than the sum of its proper divisors (624356258).

981131206 is a wasteful number, since it uses less digits than its factorization.

981131206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44596886.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 981131206 is about 31323.0139992945. The cubic root of 981131206 is about 993.6704229832.

The spelling of 981131206 in words is "nine hundred eighty-one million, one hundred thirty-one thousand, two hundred six".