670690919 has 4 divisors (see below), whose sum is σ = 710143344. Its totient is φ = 631238496.

The previous prime is 670690901. The next prime is 670690939. The reversal of 670690919 is 919096076.

It is a happy number.

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 670690919 - 2⁸ = 670690663 is a prime.

It is a super-2 number, since 2×670690919² = 899652617658129122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670690939) 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, 19726187 + ... + 19726220.

It is an arithmetic number, because the mean of its divisors is an integer number (177535836).

Almost surely, 2^670690919 is an apocalyptic number.

670690919 is a deficient number, since it is larger than the sum of its proper divisors (39452425).

670690919 is a wasteful number, since it uses less digits than its factorization.

670690919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39452424.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 670690919 is about 25897.7010369647. The cubic root of 670690919 is about 875.3346938384.

The spelling of 670690919 in words is "six hundred seventy million, six hundred ninety thousand, nine hundred nineteen".