389743397 has 8 divisors (see below), whose sum is σ = 397501344. Its totient is φ = 382000528.

The previous prime is 389743391. The next prime is 389743399. The reversal of 389743397 is 793347983.

It is a happy number.

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 389743397 - 2¹⁶ = 389677861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389743391) 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, 58478 + ... + 64800.

It is an arithmetic number, because the mean of its divisors is an integer number (49687668).

Almost surely, 2^389743397 is an apocalyptic number.

389743397 is the 10553-rd centered heptagonal number.

It is an amenable number.

389743397 is a deficient number, since it is larger than the sum of its proper divisors (7757947).

389743397 is a wasteful number, since it uses less digits than its factorization.

389743397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7539.

The product of its digits is 3429216, while the sum is 53.

The square root of 389743397 is about 19741.9197901319. The cubic root of 389743397 is about 730.4540847837.

The spelling of 389743397 in words is "three hundred eighty-nine million, seven hundred forty-three thousand, three hundred ninety-seven".