1378065193 has 4 divisors (see below), whose sum is σ = 1450594960. Its totient is φ = 1305535428.

The previous prime is 1378065187. The next prime is 1378065197. The reversal of 1378065193 is 3915608731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1378065193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378065197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36264855 + ... + 36264892.

It is an arithmetic number, because the mean of its divisors is an integer number (362648740).

Almost surely, 2^1378065193 is an apocalyptic number.

It is an amenable number.

1378065193 is a deficient number, since it is larger than the sum of its proper divisors (72529767).

1378065193 is an equidigital number, since it uses as much as digits as its factorization.

1378065193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72529766.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1378065193 is about 37122.3004809777. The cubic root of 1378065193 is about 1112.8157263715.

The spelling of 1378065193 in words is "one billion, three hundred seventy-eight million, sixty-five thousand, one hundred ninety-three".