1381409039 has 2 divisors, whose sum is σ = 1381409040. Its totient is φ = 1381409038.

The previous prime is 1381409033. The next prime is 1381409047. The reversal of 1381409039 is 9309041831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1381409039 - 2²⁰ = 1380360463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381408993 and 1381409011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381409033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690704519 + 690704520.

It is an arithmetic number, because the mean of its divisors is an integer number (690704520).

Almost surely, 2^1381409039 is an apocalyptic number.

1381409039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381409039 is an equidigital number, since it uses as much as digits as its factorization.

1381409039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1381409039 is about 37167.3114308797. The cubic root of 1381409039 is about 1113.7150739433.

The spelling of 1381409039 in words is "one billion, three hundred eighty-one million, four hundred nine thousand, thirty-nine".