1389508437 has 16 divisors (see below), whose sum is σ = 1951516160. Its totient is φ = 876986352.

The previous prime is 1389508433. The next prime is 1389508441. The reversal of 1389508437 is 7348059831.

It is an interprime number because it is at equal distance from previous prime (1389508433) and next prime (1389508441).

It is not a de Polignac number, because 1389508437 - 2² = 1389508433 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 (1389508433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85248 + ... + 100230.

It is an arithmetic number, because the mean of its divisors is an integer number (121969760).

Almost surely, 2^1389508437 is an apocalyptic number.

It is an amenable number.

1389508437 is a deficient number, since it is larger than the sum of its proper divisors (562007723).

1389508437 is a wasteful number, since it uses less digits than its factorization.

1389508437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16632.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 1389508437 is about 37276.1108083985. The cubic root of 1389508437 is about 1115.8874571766.

The spelling of 1389508437 in words is "one billion, three hundred eighty-nine million, five hundred eight thousand, four hundred thirty-seven".