1385563834 has 4 divisors (see below), whose sum is σ = 2078345754. Its totient is φ = 692781916.

The previous prime is 1385563787. The next prime is 1385563859. The reversal of 1385563834 is 4383655831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4383655831 = 47 ⋅93269273.

It can be written as a sum of positive squares in only one way, i.e., 1384063209 + 1500625 = 37203^2 + 1225^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346390957 + ... + 346390960.

Almost surely, 2^1385563834 is an apocalyptic number.

1385563834 is a deficient number, since it is larger than the sum of its proper divisors (692781920).

1385563834 is an equidigital number, since it uses as much as digits as its factorization.

1385563834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692781919.

The product of its digits is 1036800, while the sum is 46.

The square root of 1385563834 is about 37223.1626007248. The cubic root of 1385563834 is about 1114.8305114830.

The spelling of 1385563834 in words is "one billion, three hundred eighty-five million, five hundred sixty-three thousand, eight hundred thirty-four".