389213949 has 4 divisors (see below), whose sum is σ = 518951936. Its totient is φ = 259475964.

The previous prime is 389213939. The next prime is 389213971. The reversal of 389213949 is 949312983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 389213949 - 2²⁰ = 388165373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 389213898 and 389213907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389213939) 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, 64868989 + ... + 64868994.

It is an arithmetic number, because the mean of its divisors is an integer number (129737984).

Almost surely, 2^389213949 is an apocalyptic number.

It is an amenable number.

389213949 is a deficient number, since it is larger than the sum of its proper divisors (129737987).

389213949 is a wasteful number, since it uses less digits than its factorization.

389213949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129737986.

The product of its digits is 419904, while the sum is 48.

The square root of 389213949 is about 19728.5060002018. The cubic root of 389213949 is about 730.1231724355.

The spelling of 389213949 in words is "three hundred eighty-nine million, two hundred thirteen thousand, nine hundred forty-nine".