1373865461 has 2 divisors, whose sum is σ = 1373865462. Its totient is φ = 1373865460.

The previous prime is 1373865419. The next prime is 1373865491. The reversal of 1373865461 is 1645683731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1265580625 + 108284836 = 35575^2 + 10406^2 .

It is an emirp because it is prime and its reverse (1645683731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373865461 - 2²² = 1369671157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373865491) 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, 686932730 + 686932731.

It is an arithmetic number, because the mean of its divisors is an integer number (686932731).

Almost surely, 2^1373865461 is an apocalyptic number.

It is an amenable number.

1373865461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373865461 is an equidigital number, since it uses as much as digits as its factorization.

1373865461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 1373865461 is about 37065.6911577270. The cubic root of 1373865461 is about 1111.6841196550.

The spelling of 1373865461 in words is "one billion, three hundred seventy-three million, eight hundred sixty-five thousand, four hundred sixty-one".