1378765933 has 2 divisors, whose sum is σ = 1378765934. Its totient is φ = 1378765932.

The previous prime is 1378765877. The next prime is 1378765957. The reversal of 1378765933 is 3395678731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1145348649 + 233417284 = 33843^2 + 15278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378765933 - 2²⁵ = 1345211501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378765963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689382966 + 689382967.

It is an arithmetic number, because the mean of its divisors is an integer number (689382967).

Almost surely, 2^1378765933 is an apocalyptic number.

It is an amenable number.

1378765933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378765933 is an equidigital number, since it uses as much as digits as its factorization.

1378765933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 52.

The square root of 1378765933 is about 37131.7375435085. The cubic root of 1378765933 is about 1113.0043150197.

The spelling of 1378765933 in words is "one billion, three hundred seventy-eight million, seven hundred sixty-five thousand, nine hundred thirty-three".