671611393 has 2 divisors, whose sum is σ = 671611394. Its totient is φ = 671611392.

The previous prime is 671611387. The next prime is 671611399. The reversal of 671611393 is 393116176.

It is a balanced prime because it is at equal distance from previous prime (671611387) and next prime (671611399).

It can be written as a sum of positive squares in only one way, i.e., 572549184 + 99062209 = 23928^2 + 9953^2 .

It is a cyclic number.

It is not a de Polignac number, because 671611393 - 2⁵ = 671611361 is a prime.

It is not a weakly prime, because it can be changed into another prime (671611399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335805696 + 335805697.

It is an arithmetic number, because the mean of its divisors is an integer number (335805697).

Almost surely, 2^671611393 is an apocalyptic number.

It is an amenable number.

671611393 is a deficient number, since it is larger than the sum of its proper divisors (1).

671611393 is an equidigital number, since it uses as much as digits as its factorization.

671611393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 671611393 is about 25915.4662894573. The cubic root of 671611393 is about 875.7349549654.

The spelling of 671611393 in words is "six hundred seventy-one million, six hundred eleven thousand, three hundred ninety-three".