68573761 has 2 divisors, whose sum is σ = 68573762. Its totient is φ = 68573760.

The previous prime is 68573759. The next prime is 68573773. The reversal of 68573761 is 16737586.

68573761 = 5855² + 5856².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34292736 + 34281025 = 5856^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 68573761 - 2¹ = 68573759 is a prime.

Together with 68573759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68573731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34286880 + 34286881.

It is an arithmetic number, because the mean of its divisors is an integer number (34286881).

Almost surely, 2^68573761 is an apocalyptic number.

68573761 is the 5856-th centered square number.

It is an amenable number.

68573761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68573761 is an equidigital number, since it uses as much as digits as its factorization.

68573761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 68573761 is about 8280.9275446655. The cubic root of 68573761 is about 409.3102839719.

The spelling of 68573761 in words is "sixty-eight million, five hundred seventy-three thousand, seven hundred sixty-one".