1389396677 has 4 divisors (see below), whose sum is σ = 1406136480. Its totient is φ = 1372656876.

The previous prime is 1389396653. The next prime is 1389396691. The reversal of 1389396677 is 7766939831.

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 cyclic number.

It is not a de Polignac number, because 1389396677 - 2¹⁸ = 1389134533 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 (1389396577) 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, 8369777 + ... + 8369942.

It is an arithmetic number, because the mean of its divisors is an integer number (351534120).

Almost surely, 2^1389396677 is an apocalyptic number.

It is an amenable number.

1389396677 is a deficient number, since it is larger than the sum of its proper divisors (16739803).

1389396677 is an equidigital number, since it uses as much as digits as its factorization.

1389396677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16739802.

The product of its digits is 10287648, while the sum is 59.

The square root of 1389396677 is about 37274.6116948252. The cubic root of 1389396677 is about 1115.8575389401.

The spelling of 1389396677 in words is "one billion, three hundred eighty-nine million, three hundred ninety-six thousand, six hundred seventy-seven".