981975100 has 36 divisors (see below), whose sum is σ = 2243042200. Its totient is φ = 372116160.

The previous prime is 981975077. The next prime is 981975103. The reversal of 981975100 is 1579189.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981975103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256515 + ... + 260314.

Almost surely, 2^981975100 is an apocalyptic number.

It is an amenable number.

981975100 is an abundant number, since it is smaller than the sum of its proper divisors (1261067100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981975100 is a wasteful number, since it uses less digits than its factorization.

981975100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516862 (or 516855 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 981975100 is about 31336.4819340015. The cubic root of 981975100 is about 993.9552344329.

The spelling of 981975100 in words is "nine hundred eighty-one million, nine hundred seventy-five thousand, one hundred".