76344643 has 4 divisors (see below), whose sum is σ = 77638680. Its totient is φ = 75050608.

The previous prime is 76344589. The next prime is 76344647. The reversal of 76344643 is 34644367.

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 76344643 - 2²¹ = 74247491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76344647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646930 + ... + 647047.

It is an arithmetic number, because the mean of its divisors is an integer number (19409670).

Almost surely, 2^76344643 is an apocalyptic number.

76344643 is a deficient number, since it is larger than the sum of its proper divisors (1294037).

76344643 is a wasteful number, since it uses less digits than its factorization.

76344643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294036.

The product of its digits is 145152, while the sum is 37.

The square root of 76344643 is about 8737.5421601272. The cubic root of 76344643 is about 424.2216767575.

The spelling of 76344643 in words is "seventy-six million, three hundred forty-four thousand, six hundred forty-three".