76997943 has 24 divisors (see below), whose sum is σ = 122028816. Its totient is φ = 46396800.

The previous prime is 76997939. The next prime is 76997983. The reversal of 76997943 is 34979967.

It is not a de Polignac number, because 76997943 - 2² = 76997939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76997943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76997933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15771 + ... + 20067.

It is an arithmetic number, because the mean of its divisors is an integer number (5084534).

Almost surely, 2^76997943 is an apocalyptic number.

76997943 is a deficient number, since it is larger than the sum of its proper divisors (45030873).

76997943 is a wasteful number, since it uses less digits than its factorization.

76997943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495 (or 4492 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 76997943 is about 8774.8471781564. The cubic root of 76997943 is about 425.4282981063.

The spelling of 76997943 in words is "seventy-six million, nine hundred ninety-seven thousand, nine hundred forty-three".