705331387 has 4 divisors (see below), whose sum is σ = 705495280. Its totient is φ = 705167496.

The previous prime is 705331381. The next prime is 705331399. The reversal of 705331387 is 783133507.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 705331387 - 2¹⁹ = 704807099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705331381) 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, 75312 + ... + 84157.

It is an arithmetic number, because the mean of its divisors is an integer number (176373820).

Almost surely, 2^705331387 is an apocalyptic number.

705331387 is a deficient number, since it is larger than the sum of its proper divisors (163893).

705331387 is a wasteful number, since it uses less digits than its factorization.

705331387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163892.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 705331387 is about 26558.0757397821. The cubic root of 705331387 is about 890.1524744027.

The spelling of 705331387 in words is "seven hundred five million, three hundred thirty-one thousand, three hundred eighty-seven".