1381979659 has 8 divisors (see below), whose sum is σ = 1475752320. Its totient is φ = 1291281600.

The previous prime is 1381979639. The next prime is 1381979663. The reversal of 1381979659 is 9569791831.

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 1381979659 - 2¹³ = 1381971467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381979639) 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, 767722 + ... + 769519.

It is an arithmetic number, because the mean of its divisors is an integer number (184469040).

Almost surely, 2^1381979659 is an apocalyptic number.

1381979659 is a deficient number, since it is larger than the sum of its proper divisors (93772661).

1381979659 is a wasteful number, since it uses less digits than its factorization.

1381979659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537301.

The product of its digits is 3674160, while the sum is 58.

The square root of 1381979659 is about 37174.9870073952. The cubic root of 1381979659 is about 1113.8684006299.

The spelling of 1381979659 in words is "one billion, three hundred eighty-one million, nine hundred seventy-nine thousand, six hundred fifty-nine".