670784129 has 4 divisors (see below), whose sum is σ = 675226560. Its totient is φ = 666341700.

The previous prime is 670784117. The next prime is 670784161. The reversal of 670784129 is 921487076.

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-670784129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670784129.

It is not an unprimeable number, because it can be changed into a prime (670781129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220989 + ... + 2221290.

It is an arithmetic number, because the mean of its divisors is an integer number (168806640).

Almost surely, 2^670784129 is an apocalyptic number.

It is an amenable number.

670784129 is a deficient number, since it is larger than the sum of its proper divisors (4442431).

670784129 is a wasteful number, since it uses less digits than its factorization.

670784129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442430.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 670784129 is about 25899.5005550300. The cubic root of 670784129 is about 875.3752421571.

The spelling of 670784129 in words is "six hundred seventy million, seven hundred eighty-four thousand, one hundred twenty-nine".