996749983 has 4 divisors (see below), whose sum is σ = 997375720. Its totient is φ = 996124248.

The previous prime is 996749969. The next prime is 996749987. The reversal of 996749983 is 389947699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389947699 = 37 ⋅10539127.

It is a cyclic number.

It is not a de Polignac number, because 996749983 - 2⁵ = 996749951 is a prime.

It is a super-2 number, since 2×996749983² = 1987021057221000578, 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 (996749987) 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, 310473 + ... + 313666.

It is an arithmetic number, because the mean of its divisors is an integer number (249343930).

Almost surely, 2^996749983 is an apocalyptic number.

996749983 is a deficient number, since it is larger than the sum of its proper divisors (625737).

996749983 is a wasteful number, since it uses less digits than its factorization.

996749983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625736.

The product of its digits is 26453952, while the sum is 64.

The square root of 996749983 is about 31571.3475005423. The cubic root of 996749983 is about 998.9154852530.

The spelling of 996749983 in words is "nine hundred ninety-six million, seven hundred forty-nine thousand, nine hundred eighty-three".