670021047 has 6 divisors (see below), whose sum is σ = 967808192. Its totient is φ = 446680692.

The previous prime is 670021043. The next prime is 670021061. The reversal of 670021047 is 740120076.

It is not a de Polignac number, because 670021047 - 2² = 670021043 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 670021047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670021043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37223383 + ... + 37223400.

Almost surely, 2^670021047 is an apocalyptic number.

670021047 is a deficient number, since it is larger than the sum of its proper divisors (297787145).

670021047 is a wasteful number, since it uses less digits than its factorization.

670021047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74446789 (or 74446786 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 670021047 is about 25884.7647661709. The cubic root of 670021047 is about 875.0431747948.

The spelling of 670021047 in words is "six hundred seventy million, twenty-one thousand, forty-seven".