996997247 has 4 divisors (see below), whose sum is σ = 997201920. Its totient is φ = 996792576.

The previous prime is 996997223. The next prime is 996997259. The reversal of 996997247 is 742799699.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742799699 = 19 ⋅39094721.

It is a cyclic number.

It is not a de Polignac number, because 996997247 - 2⁸ = 996996991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 996997247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996997207) 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, 94847 + ... + 104832.

It is an arithmetic number, because the mean of its divisors is an integer number (249300480).

Almost surely, 2^996997247 is an apocalyptic number.

996997247 is a deficient number, since it is larger than the sum of its proper divisors (204673).

996997247 is a wasteful number, since it uses less digits than its factorization.

996997247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204672.

The product of its digits is 15431472, while the sum is 62.

The square root of 996997247 is about 31575.2632134714. The cubic root of 996997247 is about 998.9980788225.

The spelling of 996997247 in words is "nine hundred ninety-six million, nine hundred ninety-seven thousand, two hundred forty-seven".