68140747 has 2 divisors, whose sum is σ = 68140748. Its totient is φ = 68140746.

The previous prime is 68140711. The next prime is 68140753. The reversal of 68140747 is 74704186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68140747 - 2⁷ = 68140619 is a prime.

It is a super-2 number, since 2×68140747² = 9286322803436018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68140757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34070373 + 34070374.

It is an arithmetic number, because the mean of its divisors is an integer number (34070374).

Almost surely, 2^68140747 is an apocalyptic number.

68140747 is a deficient number, since it is larger than the sum of its proper divisors (1).

68140747 is an equidigital number, since it uses as much as digits as its factorization.

68140747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 68140747 is about 8254.7408802457. The cubic root of 68140747 is about 408.4469243146.

The spelling of 68140747 in words is "sixty-eight million, one hundred forty thousand, seven hundred forty-seven".