76744993 has 8 divisors (see below), whose sum is σ = 84882728. Its totient is φ = 68926464.

The previous prime is 76744979. The next prime is 76745027. The reversal of 76744993 is 39944767.

It can be written as a sum of positive squares in 4 ways, for example, as 16418704 + 60326289 = 4052^2 + 7767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76744993 - 2⁵ = 76744961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76744963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79296 + ... + 80257.

It is an arithmetic number, because the mean of its divisors is an integer number (10610341).

Almost surely, 2^76744993 is an apocalyptic number.

It is an amenable number.

76744993 is a deficient number, since it is larger than the sum of its proper divisors (8137735).

76744993 is a wasteful number, since it uses less digits than its factorization.

76744993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159603.

The product of its digits is 1143072, while the sum is 49.

The square root of 76744993 is about 8760.4219647229. The cubic root of 76744993 is about 424.9619213865.

The spelling of 76744993 in words is "seventy-six million, seven hundred forty-four thousand, nine hundred ninety-three".