671447039 has 2 divisors, whose sum is σ = 671447040. Its totient is φ = 671447038.

The previous prime is 671447003. The next prime is 671447053. The reversal of 671447039 is 930744176.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671447039 is a prime.

It is a super-2 number, since 2×671447039² = 901682252363735042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 671446987 and 671447005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671449039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335723519 + 335723520.

It is an arithmetic number, because the mean of its divisors is an integer number (335723520).

Almost surely, 2^671447039 is an apocalyptic number.

671447039 is a deficient number, since it is larger than the sum of its proper divisors (1).

671447039 is an equidigital number, since it uses as much as digits as its factorization.

671447039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 671447039 is about 25912.2951318481. The cubic root of 671447039 is about 875.6635137091.

The spelling of 671447039 in words is "six hundred seventy-one million, four hundred forty-seven thousand, thirty-nine".