671019623 has 2 divisors, whose sum is σ = 671019624. Its totient is φ = 671019622.

The previous prime is 671019617. The next prime is 671019647. The reversal of 671019623 is 326910176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671019623 - 2¹⁴ = 671003239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671019823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335509811 + 335509812.

It is an arithmetic number, because the mean of its divisors is an integer number (335509812).

Almost surely, 2^671019623 is an apocalyptic number.

671019623 is a deficient number, since it is larger than the sum of its proper divisors (1).

671019623 is an equidigital number, since it uses as much as digits as its factorization.

671019623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 671019623 is about 25904.0464599645. The cubic root of 671019623 is about 875.4776702901.

Adding to 671019623 its reverse (326910176), we get a palindrome (997929799).

The spelling of 671019623 in words is "six hundred seventy-one million, nineteen thousand, six hundred twenty-three".