670965401 has 4 divisors (see below), whose sum is σ = 710433972. Its totient is φ = 631496832.

The previous prime is 670965391. The next prime is 670965433. The reversal of 670965401 is 104569076.

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 266995600 + 403969801 = 16340^2 + 20099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670965401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670965301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19734260 + ... + 19734293.

It is an arithmetic number, because the mean of its divisors is an integer number (177608493).

Almost surely, 2^670965401 is an apocalyptic number.

It is an amenable number.

670965401 is a deficient number, since it is larger than the sum of its proper divisors (39468571).

670965401 is a wasteful number, since it uses less digits than its factorization.

670965401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39468570.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 670965401 is about 25902.9998455777. Note that the first 3 decimals coincide. The cubic root of 670965401 is about 875.4540885511.

The spelling of 670965401 in words is "six hundred seventy million, nine hundred sixty-five thousand, four hundred one".