385207489 has 4 divisors (see below), whose sum is σ = 386012160. Its totient is φ = 384402820.

The previous prime is 385207477. The next prime is 385207517. The reversal of 385207489 is 984702583.

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 385207489 - 2⁹ = 385206977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385207409) 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, 401617 + ... + 402574.

It is an arithmetic number, because the mean of its divisors is an integer number (96503040).

Almost surely, 2^385207489 is an apocalyptic number.

It is an amenable number.

385207489 is a deficient number, since it is larger than the sum of its proper divisors (804671).

385207489 is an equidigital number, since it uses as much as digits as its factorization.

385207489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804670.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 385207489 is about 19626.7034674700. The cubic root of 385207489 is about 727.6092986942.

The spelling of 385207489 in words is "three hundred eighty-five million, two hundred seven thousand, four hundred eighty-nine".