1386725979 has 8 divisors (see below), whose sum is σ = 1849851472. Its totient is φ = 924042240.

The previous prime is 1386725957. The next prime is 1386725983. The reversal of 1386725979 is 9795276831.

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

It is not a de Polignac number, because 1386725979 - 2¹² = 1386721883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386724979) 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, 103042 + ... + 115719.

It is an arithmetic number, because the mean of its divisors is an integer number (231231434).

Almost surely, 2^1386725979 is an apocalyptic number.

1386725979 is a deficient number, since it is larger than the sum of its proper divisors (463125493).

1386725979 is a wasteful number, since it uses less digits than its factorization.

1386725979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220877.

The product of its digits is 5715360, while the sum is 57.

The square root of 1386725979 is about 37238.7698373617. The cubic root of 1386725979 is about 1115.1421133050.

The spelling of 1386725979 in words is "one billion, three hundred eighty-six million, seven hundred twenty-five thousand, nine hundred seventy-nine".