1378937913 has 8 divisors (see below), whose sum is σ = 1838755776. Its totient is φ = 919206000.

The previous prime is 1378937909. The next prime is 1378937947. The reversal of 1378937913 is 3197398731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1378937913 - 2² = 1378937909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378937713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48763 + ... + 71663.

It is an arithmetic number, because the mean of its divisors is an integer number (229844472).

Almost surely, 2^1378937913 is an apocalyptic number.

It is an amenable number.

1378937913 is a deficient number, since it is larger than the sum of its proper divisors (459817863).

1378937913 is a wasteful number, since it uses less digits than its factorization.

1378937913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42975.

The product of its digits is 857304, while the sum is 51.

The square root of 1378937913 is about 37134.0532799747. The cubic root of 1378937913 is about 1113.0505898609.

The spelling of 1378937913 in words is "one billion, three hundred seventy-eight million, nine hundred thirty-seven thousand, nine hundred thirteen".