983173997 has 4 divisors (see below), whose sum is σ = 1058802780. Its totient is φ = 907545216.

The previous prime is 983173993. The next prime is 983173999. The reversal of 983173997 is 799371389.

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 528034441 + 455139556 = 22979^2 + 21334^2 .

It is a cyclic number.

It is not a de Polignac number, because 983173997 - 2² = 983173993 is a prime.

It is a super-2 number, since 2×983173997² = 1933262216753912018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983173993) 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, 37814372 + ... + 37814397.

It is an arithmetic number, because the mean of its divisors is an integer number (264700695).

Almost surely, 2^983173997 is an apocalyptic number.

It is an amenable number.

983173997 is a deficient number, since it is larger than the sum of its proper divisors (75628783).

983173997 is a wasteful number, since it uses less digits than its factorization.

983173997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75628782.

The product of its digits is 2571912, while the sum is 56.

The square root of 983173997 is about 31355.6055116147. The cubic root of 983173997 is about 994.3595777861.

The spelling of 983173997 in words is "nine hundred eighty-three million, one hundred seventy-three thousand, nine hundred ninety-seven".