1389501869 has 12 divisors (see below), whose sum is σ = 1617660000. Its totient is φ = 1190043288.

The previous prime is 1389501857. The next prime is 1389501899. The reversal of 1389501869 is 9681059831.

It is a happy number.

It is not a de Polignac number, because 1389501869 - 2¹² = 1389497773 is a prime.

It is a super-2 number, since 2×1389501869² = 3861430887908986322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389501899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53882 + ... + 75380.

It is an arithmetic number, because the mean of its divisors is an integer number (134805000).

Almost surely, 2^1389501869 is an apocalyptic number.

It is an amenable number.

1389501869 is a deficient number, since it is larger than the sum of its proper divisors (228158131).

1389501869 is a wasteful number, since it uses less digits than its factorization.

1389501869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22832 (or 22825 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1389501869 is about 37276.0227089747. The cubic root of 1389501869 is about 1115.8856989624.

The spelling of 1389501869 in words is "one billion, three hundred eighty-nine million, five hundred one thousand, eight hundred sixty-nine".