1384737857 has 2 divisors, whose sum is σ = 1384737858. Its totient is φ = 1384737856.

The previous prime is 1384737811. The next prime is 1384737883. The reversal of 1384737857 is 7587374831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1339633201 + 45104656 = 36601^2 + 6716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1384737857 - 2¹⁰ = 1384736833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1384737799 and 1384737808.

It is not a weakly prime, because it can be changed into another prime (1384730857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692368928 + 692368929.

It is an arithmetic number, because the mean of its divisors is an integer number (692368929).

Almost surely, 2^1384737857 is an apocalyptic number.

It is an amenable number.

1384737857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1384737857 is an equidigital number, since it uses as much as digits as its factorization.

1384737857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3951360, while the sum is 53.

The square root of 1384737857 is about 37212.0660135930. The cubic root of 1384737857 is about 1114.6089392545.

The spelling of 1384737857 in words is "one billion, three hundred eighty-four million, seven hundred thirty-seven thousand, eight hundred fifty-seven".