670213849 has 4 divisors (see below), whose sum is σ = 672397264. Its totient is φ = 668030436.

The previous prime is 670213823. The next prime is 670213853. The reversal of 670213849 is 948312076.

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 a de Polignac number, because none of the positive numbers 2^k-670213849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670213889) 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, 1091247 + ... + 1091860.

It is an arithmetic number, because the mean of its divisors is an integer number (168099316).

Almost surely, 2^670213849 is an apocalyptic number.

It is an amenable number.

670213849 is a deficient number, since it is larger than the sum of its proper divisors (2183415).

670213849 is a wasteful number, since it uses less digits than its factorization.

670213849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183414.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 670213849 is about 25888.4887353434. The cubic root of 670213849 is about 875.1270994691.

The spelling of 670213849 in words is "six hundred seventy million, two hundred thirteen thousand, eight hundred forty-nine".