68746783 has 4 divisors (see below), whose sum is σ = 78567760. Its totient is φ = 58925808.

The previous prime is 68746771. The next prime is 68746787. The reversal of 68746783 is 38764786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38764786 = 2 ⋅19382393.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68746783 is a prime.

It is a super-2 number, since 2×68746783² = 9452240345698178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68746787) 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, 4910478 + ... + 4910491.

It is an arithmetic number, because the mean of its divisors is an integer number (19641940).

Almost surely, 2^68746783 is an apocalyptic number.

68746783 is a deficient number, since it is larger than the sum of its proper divisors (9820977).

68746783 is an equidigital number, since it uses as much as digits as its factorization.

68746783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820976.

The product of its digits is 1354752, while the sum is 49.

The square root of 68746783 is about 8291.3679812200. The cubic root of 68746783 is about 409.6542454879.

The spelling of 68746783 in words is "sixty-eight million, seven hundred forty-six thousand, seven hundred eighty-three".