981804393 has 12 divisors (see below), whose sum is σ = 1418876160. Its totient is φ = 654206616.

The previous prime is 981804391. The next prime is 981804433. The reversal of 981804393 is 393408189.

It is not a de Polignac number, because 981804393 - 2¹ = 981804391 is a prime.

It is a super-2 number, since 2×981804393² = 1927879732228196898, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (981804391) 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, 7873 + ... + 45006.

It is an arithmetic number, because the mean of its divisors is an integer number (118239680).

Almost surely, 2^981804393 is an apocalyptic number.

It is an amenable number.

981804393 is a deficient number, since it is larger than the sum of its proper divisors (437071767).

981804393 is a wasteful number, since it uses less digits than its factorization.

981804393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54948 (or 54945 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 981804393 is about 31333.7580414479. The cubic root of 981804393 is about 993.8976345510.

The spelling of 981804393 in words is "nine hundred eighty-one million, eight hundred four thousand, three hundred ninety-three".