385918397 has 4 divisors (see below), whose sum is σ = 390803520. Its totient is φ = 381033276.

The previous prime is 385918373. The next prime is 385918409. The reversal of 385918397 is 793819583.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 385918397 - 2⁶ = 385918333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385918307) 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, 2442443 + ... + 2442600.

It is an arithmetic number, because the mean of its divisors is an integer number (97700880).

Almost surely, 2^385918397 is an apocalyptic number.

It is an amenable number.

385918397 is a deficient number, since it is larger than the sum of its proper divisors (4885123).

385918397 is an equidigital number, since it uses as much as digits as its factorization.

385918397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885122.

The product of its digits is 1632960, while the sum is 53.

The square root of 385918397 is about 19644.8058529475. The cubic root of 385918397 is about 728.0566293800.

The spelling of 385918397 in words is "three hundred eighty-five million, nine hundred eighteen thousand, three hundred ninety-seven".