1380861693 has 6 divisors (see below), whose sum is σ = 1994578014. Its totient is φ = 920574456.

The previous prime is 1380861667. The next prime is 1380861701. The reversal of 1380861693 is 3961680831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1325105604 + 55756089 = 36402^2 + 7467^2 .

It is not a de Polignac number, because 1380861693 - 2⁵ = 1380861661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380868693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76714530 + ... + 76714547.

It is an arithmetic number, because the mean of its divisors is an integer number (332429669).

Almost surely, 2^1380861693 is an apocalyptic number.

It is an amenable number.

1380861693 is a deficient number, since it is larger than the sum of its proper divisors (613716321).

1380861693 is a wasteful number, since it uses less digits than its factorization.

1380861693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153429083 (or 153429080 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1380861693 is about 37159.9474299951. The cubic root of 1380861693 is about 1113.5679613449.

The spelling of 1380861693 in words is "one billion, three hundred eighty million, eight hundred sixty-one thousand, six hundred ninety-three".