1307893 has 2 divisors, whose sum is σ = 1307894. Its totient is φ = 1307892.

The previous prime is 1307863. The next prime is 1307909. The reversal of 1307893 is 3987031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306449 + 1444 = 1143^2 + 38^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1307893 is a prime.

It is an Ulam number.

1307893 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1307833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653946 + 653947.

It is an arithmetic number, because the mean of its divisors is an integer number (653947).

2^1307893 is an apocalyptic number.

It is an amenable number.

1307893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307893 is an equidigital number, since it uses as much as digits as its factorization.

1307893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1307893 is about 1143.6314965932. The cubic root of 1307893 is about 109.3597239073.

The spelling of 1307893 in words is "one million, three hundred seven thousand, eight hundred ninety-three".