670671979 has 4 divisors (see below), whose sum is σ = 671063400. Its totient is φ = 670280560.

The previous prime is 670671977. The next prime is 670671983. The reversal of 670671979 is 979176076.

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 670671979 - 2¹ = 670671977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670671971) 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, 193129 + ... + 196570.

It is an arithmetic number, because the mean of its divisors is an integer number (167765850).

Almost surely, 2^670671979 is an apocalyptic number.

670671979 is a deficient number, since it is larger than the sum of its proper divisors (391421).

670671979 is a wasteful number, since it uses less digits than its factorization.

670671979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391420.

The product of its (nonzero) digits is 1000188, while the sum is 52.

The square root of 670671979 is about 25897.3353648595. The cubic root of 670671979 is about 875.3264540791.

The spelling of 670671979 in words is "six hundred seventy million, six hundred seventy-one thousand, nine hundred seventy-nine".