670129287 has 4 divisors (see below), whose sum is σ = 893505720. Its totient is φ = 446752856.

The previous prime is 670129283. The next prime is 670129289. The reversal of 670129287 is 782921076.

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 670129287 - 2² = 670129283 is a prime.

It is a super-2 number, since 2×670129287² = 898146522590256738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670129283) 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, 111688212 + ... + 111688217.

It is an arithmetic number, because the mean of its divisors is an integer number (223376430).

Almost surely, 2^670129287 is an apocalyptic number.

670129287 is a deficient number, since it is larger than the sum of its proper divisors (223376433).

670129287 is a wasteful number, since it uses less digits than its factorization.

670129287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223376432.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 670129287 is about 25886.8554869069. The cubic root of 670129287 is about 875.0902925054.

The spelling of 670129287 in words is "six hundred seventy million, one hundred twenty-nine thousand, two hundred eighty-seven".