76972643 has 4 divisors (see below), whose sum is σ = 83970168. Its totient is φ = 69975120.

The previous prime is 76972633. The next prime is 76972657. The reversal of 76972643 is 34627967.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 76972643 - 2⁴ = 76972627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76972594 and 76972603.

It is not an unprimeable number, because it can be changed into a prime (76972633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3498746 + ... + 3498767.

It is an arithmetic number, because the mean of its divisors is an integer number (20992542).

Almost surely, 2^76972643 is an apocalyptic number.

76972643 is a deficient number, since it is larger than the sum of its proper divisors (6997525).

76972643 is a wasteful number, since it uses less digits than its factorization.

76972643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997524.

The product of its digits is 381024, while the sum is 44.

The square root of 76972643 is about 8773.4054391667. The cubic root of 76972643 is about 425.3816972293.

The spelling of 76972643 in words is "seventy-six million, nine hundred seventy-two thousand, six hundred forty-three".