670379993 has 4 divisors (see below), whose sum is σ = 670432308. Its totient is φ = 670327680.

The previous prime is 670379981. The next prime is 670380001. The reversal of 670379993 is 399973076.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 329349904 + 341030089 = 18148^2 + 18467^2 .

It is a cyclic number.

It is not a de Polignac number, because 670379993 - 2⁸ = 670379737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670373993) 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, 7505 + ... + 37377.

It is an arithmetic number, because the mean of its divisors is an integer number (167608077).

Almost surely, 2^670379993 is an apocalyptic number.

It is an amenable number.

670379993 is a deficient number, since it is larger than the sum of its proper divisors (52315).

670379993 is a wasteful number, since it uses less digits than its factorization.

670379993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52314.

The product of its (nonzero) digits is 1928934, while the sum is 53.

The square root of 670379993 is about 25891.6973757998. The cubic root of 670379993 is about 875.1994072875.

The spelling of 670379993 in words is "six hundred seventy million, three hundred seventy-nine thousand, nine hundred ninety-three".