1380947797 has 4 divisors (see below), whose sum is σ = 1453629280. Its totient is φ = 1308266316.

The previous prime is 1380947779. The next prime is 1380947831. The reversal of 1380947797 is 7977490831.

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 not a de Polignac number, because 1380947797 - 2¹⁹ = 1380423509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380947717) 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 3 ways as a sum of consecutive naturals, for example, 36340713 + ... + 36340750.

It is an arithmetic number, because the mean of its divisors is an integer number (363407320).

Almost surely, 2^1380947797 is an apocalyptic number.

It is an amenable number.

1380947797 is a deficient number, since it is larger than the sum of its proper divisors (72681483).

1380947797 is an equidigital number, since it uses as much as digits as its factorization.

1380947797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72681482.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The square root of 1380947797 is about 37161.1059711629. The cubic root of 1380947797 is about 1113.5911064732.

The spelling of 1380947797 in words is "one billion, three hundred eighty million, nine hundred forty-seven thousand, seven hundred ninety-seven".