78731333723 has 4 divisors (see below), whose sum is σ = 89978667120. Its totient is φ = 67484000328.

The previous prime is 78731333717. The next prime is 78731333749. The reversal of 78731333723 is 32733313787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32733313787 = 41 ⋅798373507.

It is a cyclic number.

It is not a de Polignac number, because 78731333723 - 2¹⁰ = 78731332699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78731330723) 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, 5623666688 + ... + 5623666701.

It is an arithmetic number, because the mean of its divisors is an integer number (22494666780).

Almost surely, 2^78731333723 is an apocalyptic number.

78731333723 is a deficient number, since it is larger than the sum of its proper divisors (11247333397).

78731333723 is a wasteful number, since it uses less digits than its factorization.

78731333723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247333396.

The product of its digits is 1333584, while the sum is 47.

The spelling of 78731333723 in words is "seventy-eight billion, seven hundred thirty-one million, three hundred thirty-three thousand, seven hundred twenty-three".