1381693813 has 8 divisors (see below), whose sum is σ = 1454889920. Its totient is φ = 1308545280.

The previous prime is 1381693799. The next prime is 1381693823. The reversal of 1381693813 is 3183961831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381693813 - 2⁹ = 1381693301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381693813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381693823) 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, 58453 + ... + 78613.

It is an arithmetic number, because the mean of its divisors is an integer number (181861240).

Almost surely, 2^1381693813 is an apocalyptic number.

It is an amenable number.

1381693813 is a deficient number, since it is larger than the sum of its proper divisors (73196107).

1381693813 is a wasteful number, since it uses less digits than its factorization.

1381693813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23787.

The product of its digits is 93312, while the sum is 43.

The square root of 1381693813 is about 37171.1422073630. The cubic root of 1381693813 is about 1113.7915985392.

The spelling of 1381693813 in words is "one billion, three hundred eighty-one million, six hundred ninety-three thousand, eight hundred thirteen".