1394862857 has 2 divisors, whose sum is σ = 1394862858. Its totient is φ = 1394862856.

The previous prime is 1394862841. The next prime is 1394862871. The reversal of 1394862857 is 7582684931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1309281856 + 85581001 = 36184^2 + 9251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394862857 - 2⁴ = 1394862841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1394862799 and 1394862808.

It is not a weakly prime, because it can be changed into another prime (1394862817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697431428 + 697431429.

It is an arithmetic number, because the mean of its divisors is an integer number (697431429).

Almost surely, 2^1394862857 is an apocalyptic number.

It is an amenable number.

1394862857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394862857 is an equidigital number, since it uses as much as digits as its factorization.

1394862857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The square root of 1394862857 is about 37347.8628170341. The cubic root of 1394862857 is about 1117.3189638454.

The spelling of 1394862857 in words is "one billion, three hundred ninety-four million, eight hundred sixty-two thousand, eight hundred fifty-seven".