670489129 has 4 divisors (see below), whose sum is σ = 709929684. Its totient is φ = 631048576.

The previous prime is 670489103. The next prime is 670489151. The reversal of 670489129 is 921984076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 322741225 + 347747904 = 17965^2 + 18648^2 .

It is a cyclic number.

It is not a de Polignac number, because 670489129 - 2²³ = 662100521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670483129) 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, 19720252 + ... + 19720285.

It is an arithmetic number, because the mean of its divisors is an integer number (177482421).

Almost surely, 2^670489129 is an apocalyptic number.

It is an amenable number.

670489129 is a deficient number, since it is larger than the sum of its proper divisors (39440555).

670489129 is a wasteful number, since it uses less digits than its factorization.

670489129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39440554.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 670489129 is about 25893.8048382234. The cubic root of 670489129 is about 875.2468980543.

The spelling of 670489129 in words is "six hundred seventy million, four hundred eighty-nine thousand, one hundred twenty-nine".