856053049 has 4 divisors (see below), whose sum is σ = 856435600. Its totient is φ = 855670500.

The previous prime is 856053047. The next prime is 856053061. The reversal of 856053049 is 940350658.

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 856053049 - 2¹ = 856053047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856053047) 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, 187899 + ... + 192400.

It is an arithmetic number, because the mean of its divisors is an integer number (214108900).

Almost surely, 2^856053049 is an apocalyptic number.

It is an amenable number.

856053049 is a deficient number, since it is larger than the sum of its proper divisors (382551).

856053049 is a wasteful number, since it uses less digits than its factorization.

856053049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382550.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 856053049 is about 29258.3842513561. The cubic root of 856053049 is about 949.5114936277.

The spelling of 856053049 in words is "eight hundred fifty-six million, fifty-three thousand, forty-nine".