2785315397 has 4 divisors (see below), whose sum is σ = 2801415660. Its totient is φ = 2769215136.

The previous prime is 2785315381. The next prime is 2785315409. The reversal of 2785315397 is 7935135872.

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 2609779396 + 175536001 = 51086^2 + 13249^2 .

It is a cyclic number.

It is not a de Polignac number, because 2785315397 - 2⁴ = 2785315381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785314397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8049872 + ... + 8050217.

It is an arithmetic number, because the mean of its divisors is an integer number (700353915).

Almost surely, 2^2785315397 is an apocalyptic number.

It is an amenable number.

2785315397 is a deficient number, since it is larger than the sum of its proper divisors (16100263).

2785315397 is a wasteful number, since it uses less digits than its factorization.

2785315397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16100262.

The product of its digits is 1587600, while the sum is 50.

The square root of 2785315397 is about 52776.0873597124. The cubic root of 2785315397 is about 1406.9914553357.

The spelling of 2785315397 in words is "two billion, seven hundred eighty-five million, three hundred fifteen thousand, three hundred ninety-seven".