1378466741 has 2 divisors, whose sum is σ = 1378466742. Its totient is φ = 1378466740.

The previous prime is 1378466693. The next prime is 1378466779. The reversal of 1378466741 is 1476648731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810597841 + 567868900 = 28471^2 + 23830^2 .

It is an emirp because it is prime and its reverse (1476648731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378466741 - 2¹⁰ = 1378465717 is a prime.

It is a super-2 number, since 2×1378466741² = 3800341112086322162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378462741) 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, 689233370 + 689233371.

It is an arithmetic number, because the mean of its divisors is an integer number (689233371).

Almost surely, 2^1378466741 is an apocalyptic number.

It is an amenable number.

1378466741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378466741 is an equidigital number, since it uses as much as digits as its factorization.

1378466741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 1378466741 is about 37127.7085341932. The cubic root of 1378466741 is about 1112.9238019393.

The spelling of 1378466741 in words is "one billion, three hundred seventy-eight million, four hundred sixty-six thousand, seven hundred forty-one".