389243737 has 4 divisors (see below), whose sum is σ = 399763876. Its totient is φ = 378723600.

The previous prime is 389243711. The next prime is 389243741. The reversal of 389243737 is 737342983.

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 320087881 + 69155856 = 17891^2 + 8316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389243737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389243537) 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, 5260014 + ... + 5260087.

It is an arithmetic number, because the mean of its divisors is an integer number (99940969).

Almost surely, 2^389243737 is an apocalyptic number.

389243737 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

389243737 is a deficient number, since it is larger than the sum of its proper divisors (10520139).

389243737 is a wasteful number, since it uses less digits than its factorization.

389243737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520138.

The product of its digits is 762048, while the sum is 46.

The square root of 389243737 is about 19729.2609339529. The cubic root of 389243737 is about 730.1417983132.

The spelling of 389243737 in words is "three hundred eighty-nine million, two hundred forty-three thousand, seven hundred thirty-seven".