981875849 has 4 divisors (see below), whose sum is σ = 989042964. Its totient is φ = 974708736.

The previous prime is 981875833. The next prime is 981875887. The reversal of 981875849 is 948578189.

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

It can be written as a sum of positive squares in 2 ways, for example, as 328153225 + 653722624 = 18115^2 + 25568^2 .

It is a cyclic number.

It is not a de Polignac number, because 981875849 - 2⁴ = 981875833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981875899) 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, 3583352 + ... + 3583625.

It is an arithmetic number, because the mean of its divisors is an integer number (247260741).

Almost surely, 2^981875849 is an apocalyptic number.

It is an amenable number.

981875849 is a deficient number, since it is larger than the sum of its proper divisors (7167115).

981875849 is a wasteful number, since it uses less digits than its factorization.

981875849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167114.

The product of its digits is 5806080, while the sum is 59.

The square root of 981875849 is about 31334.8982605656. The cubic root of 981875849 is about 993.9217460159.

The spelling of 981875849 in words is "nine hundred eighty-one million, eight hundred seventy-five thousand, eight hundred forty-nine".