671420507 has 2 divisors, whose sum is σ = 671420508. Its totient is φ = 671420506.

The previous prime is 671420501. The next prime is 671420513. The reversal of 671420507 is 705024176.

It is a balanced prime because it is at equal distance from previous prime (671420501) and next prime (671420513).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671420507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671420501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335710253 + 335710254.

It is an arithmetic number, because the mean of its divisors is an integer number (335710254).

Almost surely, 2^671420507 is an apocalyptic number.

671420507 is a deficient number, since it is larger than the sum of its proper divisors (1).

671420507 is an equidigital number, since it uses as much as digits as its factorization.

671420507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 671420507 is about 25911.7831690526. The cubic root of 671420507 is about 875.6519797091.

The spelling of 671420507 in words is "six hundred seventy-one million, four hundred twenty thousand, five hundred seven".