1368747761 has 2 divisors, whose sum is σ = 1368747762. Its totient is φ = 1368747760.

The previous prime is 1368747703. The next prime is 1368747763. The reversal of 1368747761 is 1677478631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250046736 + 118701025 = 35356^2 + 10895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368747761 - 2³⁰ = 295005937 is a prime.

Together with 1368747763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1368747763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684373880 + 684373881.

It is an arithmetic number, because the mean of its divisors is an integer number (684373881).

Almost surely, 2^1368747761 is an apocalyptic number.

It is an amenable number.

1368747761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368747761 is an equidigital number, since it uses as much as digits as its factorization.

1368747761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 50.

The square root of 1368747761 is about 36996.5912078397. The cubic root of 1368747761 is about 1110.3020472278.

The spelling of 1368747761 in words is "one billion, three hundred sixty-eight million, seven hundred forty-seven thousand, seven hundred sixty-one".