1381304737 has 2 divisors, whose sum is σ = 1381304738. Its totient is φ = 1381304736.

The previous prime is 1381304711. The next prime is 1381304773. The reversal of 1381304737 is 7374031831.

Together with next prime (1381304773) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380939921 + 364816 = 37161^2 + 604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381304737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381304696 and 1381304705.

It is not a weakly prime, because it can be changed into another prime (1381304707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690652368 + 690652369.

It is an arithmetic number, because the mean of its divisors is an integer number (690652369).

Almost surely, 2^1381304737 is an apocalyptic number.

It is an amenable number.

1381304737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381304737 is an equidigital number, since it uses as much as digits as its factorization.

1381304737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1381304737 is about 37165.9082628153. The cubic root of 1381304737 is about 1113.6870432321.

The spelling of 1381304737 in words is "one billion, three hundred eighty-one million, three hundred four thousand, seven hundred thirty-seven".