389497081 has 4 divisors (see below), whose sum is σ = 412408692. Its totient is φ = 366585472.

The previous prime is 389497079. The next prime is 389497091. The reversal of 389497081 is 180794983.

It is a happy number.

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 269485056 + 120012025 = 16416^2 + 10955^2 .

It is a cyclic number.

It is not a de Polignac number, because 389497081 - 2¹ = 389497079 is a prime.

It is a super-2 number, since 2×389497081² = 303415952215041122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389497091) 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, 11455780 + ... + 11455813.

It is an arithmetic number, because the mean of its divisors is an integer number (103102173).

Almost surely, 2^389497081 is an apocalyptic number.

It is an amenable number.

389497081 is a deficient number, since it is larger than the sum of its proper divisors (22911611).

389497081 is a wasteful number, since it uses less digits than its factorization.

389497081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22911610.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 389497081 is about 19735.6804037763. The cubic root of 389497081 is about 730.3001711691.

The spelling of 389497081 in words is "three hundred eighty-nine million, four hundred ninety-seven thousand, eighty-one".