1389610717 has 4 divisors (see below), whose sum is σ = 1515938976. Its totient is φ = 1263282460.

The previous prime is 1389610693. The next prime is 1389610811. The reversal of 1389610717 is 7170169831.

It is a happy number.

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 de Polignac number, because none of the positive numbers 2^k-1389610717 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 (1389614717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63164113 + ... + 63164134.

It is an arithmetic number, because the mean of its divisors is an integer number (378984744).

Almost surely, 2^1389610717 is an apocalyptic number.

It is an amenable number.

1389610717 is a deficient number, since it is larger than the sum of its proper divisors (126328259).

1389610717 is a wasteful number, since it uses less digits than its factorization.

1389610717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126328258.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 1389610717 is about 37277.4827073932. The cubic root of 1389610717 is about 1115.9148362040.

The spelling of 1389610717 in words is "one billion, three hundred eighty-nine million, six hundred ten thousand, seven hundred seventeen".