385916497 has 4 divisors (see below), whose sum is σ = 385962676. Its totient is φ = 385870320.

The previous prime is 385916423. The next prime is 385916513. The reversal of 385916497 is 794619583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 794619583 = 463 ⋅1716241.

It can be written as a sum of positive squares in 2 ways, for example, as 308494096 + 77422401 = 17564^2 + 8799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385916497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385916417) 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, 6654 + ... + 28567.

It is an arithmetic number, because the mean of its divisors is an integer number (96490669).

Almost surely, 2^385916497 is an apocalyptic number.

It is an amenable number.

385916497 is a deficient number, since it is larger than the sum of its proper divisors (46179).

385916497 is a wasteful number, since it uses less digits than its factorization.

385916497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46178.

The product of its digits is 1632960, while the sum is 52.

The square root of 385916497 is about 19644.7574940491. The cubic root of 385916497 is about 728.0554345593.

The spelling of 385916497 in words is "three hundred eighty-five million, nine hundred sixteen thousand, four hundred ninety-seven".