389966651 has 4 divisors (see below), whose sum is σ = 391012512. Its totient is φ = 388920792.

The previous prime is 389966623. The next prime is 389966653. The reversal of 389966651 is 156669983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389966651 - 2¹⁸ = 389704507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389966593 and 389966602.

It is not an unprimeable number, because it can be changed into a prime (389966653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522371 + ... + 523116.

It is an arithmetic number, because the mean of its divisors is an integer number (97753128).

Almost surely, 2^389966651 is an apocalyptic number.

389966651 is a deficient number, since it is larger than the sum of its proper divisors (1045861).

389966651 is a wasteful number, since it uses less digits than its factorization.

389966651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045860.

The product of its digits is 2099520, while the sum is 53.

The square root of 389966651 is about 19747.5732939518. The cubic root of 389966651 is about 730.5935318057.

The spelling of 389966651 in words is "three hundred eighty-nine million, nine hundred sixty-six thousand, six hundred fifty-one".