983931994 has 4 divisors (see below), whose sum is σ = 1475897994. Its totient is φ = 491965996.

The previous prime is 983931983. The next prime is 983931997. The reversal of 983931994 is 499139389.

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

It can be written as a sum of positive squares in only one way, i.e., 858783025 + 125148969 = 29305^2 + 11187^2 .

It is not an unprimeable number, because it can be changed into a prime (983931997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245982997 + ... + 245983000.

Almost surely, 2^983931994 is an apocalyptic number.

983931994 is a deficient number, since it is larger than the sum of its proper divisors (491966000).

983931994 is a wasteful number, since it uses less digits than its factorization.

983931994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491965999.

The product of its digits is 1889568, while the sum is 55.

The square root of 983931994 is about 31367.6902879380. The cubic root of 983931994 is about 994.6150523895.

The spelling of 983931994 in words is "nine hundred eighty-three million, nine hundred thirty-one thousand, nine hundred ninety-four".