1389327157 has 4 divisors (see below), whose sum is σ = 1437235020. Its totient is φ = 1341419296.

The previous prime is 1389327151. The next prime is 1389327161. The reversal of 1389327157 is 7517239831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1102837681 + 286489476 = 33209^2 + 16926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389327157 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 (1389327151) 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, 23953888 + ... + 23953945.

It is an arithmetic number, because the mean of its divisors is an integer number (359308755).

Almost surely, 2^1389327157 is an apocalyptic number.

It is an amenable number.

1389327157 is a deficient number, since it is larger than the sum of its proper divisors (47907863).

1389327157 is an equidigital number, since it uses as much as digits as its factorization.

1389327157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47907862.

The product of its digits is 317520, while the sum is 46.

The square root of 1389327157 is about 37273.6791449409. The cubic root of 1389327157 is about 1115.8389275742.

The spelling of 1389327157 in words is "one billion, three hundred eighty-nine million, three hundred twenty-seven thousand, one hundred fifty-seven".