1389031 has 8 divisors (see below), whose sum is σ = 1613984. Its totient is φ = 1170720.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389031 is 1309831.

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

It is a cyclic number.

It is not a de Polignac number, because 1389031 - 2¹⁷ = 1257959 is a prime.

It is a super-2 number, since 2×1389031² = 3858814237922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388987 and 1389005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389001) 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, 1200 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (201748).

2^1389031 is an apocalyptic number.

1389031 is a deficient number, since it is larger than the sum of its proper divisors (224953).

1389031 is an equidigital number, since it uses as much as digits as its factorization.

1389031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1389031 is about 1178.5715930736. The cubic root of 1389031 is about 111.5759635717.

The spelling of 1389031 in words is "one million, three hundred eighty-nine thousand, thirty-one".