68574749 has 2 divisors, whose sum is σ = 68574750. Its totient is φ = 68574748.

The previous prime is 68574733. The next prime is 68574761. The reversal of 68574749 is 94747586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 16662724 = 7205^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 68574749 - 2⁴ = 68574733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68574697 and 68574706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68574769) 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 as a sum of consecutive naturals, namely, 34287374 + 34287375.

It is an arithmetic number, because the mean of its divisors is an integer number (34287375).

Almost surely, 2^68574749 is an apocalyptic number.

It is an amenable number.

68574749 is a deficient number, since it is larger than the sum of its proper divisors (1).

68574749 is an equidigital number, since it uses as much as digits as its factorization.

68574749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 68574749 is about 8280.9871996037. The cubic root of 68574749 is about 409.3122497219.

The spelling of 68574749 in words is "sixty-eight million, five hundred seventy-four thousand, seven hundred forty-nine".