389961433 has 2 divisors, whose sum is σ = 389961434. Its totient is φ = 389961432.

The previous prime is 389961427. The next prime is 389961449. The reversal of 389961433 is 334169983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389944009 + 17424 = 19747^2 + 132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389961433 is a prime.

It is not a weakly prime, because it can be changed into another prime (389961133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194980716 + 194980717.

It is an arithmetic number, because the mean of its divisors is an integer number (194980717).

Almost surely, 2^389961433 is an apocalyptic number.

It is an amenable number.

389961433 is a deficient number, since it is larger than the sum of its proper divisors (1).

389961433 is an equidigital number, since it uses as much as digits as its factorization.

389961433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 389961433 is about 19747.4411760106. The cubic root of 389961433 is about 730.5902731902.

The spelling of 389961433 in words is "three hundred eighty-nine million, nine hundred sixty-one thousand, four hundred thirty-three".