64737671 has 2 divisors, whose sum is σ = 64737672. Its totient is φ = 64737670.

The previous prime is 64737643. The next prime is 64737689. The reversal of 64737671 is 17673746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64737671 is a prime.

It is equal to p_3825995 and since 64737671 and 3825995 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64737971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32368835 + 32368836.

It is an arithmetic number, because the mean of its divisors is an integer number (32368836).

Almost surely, 2^64737671 is an apocalyptic number.

64737671 is a deficient number, since it is larger than the sum of its proper divisors (1).

64737671 is an equidigital number, since it uses as much as digits as its factorization.

64737671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 41.

The square root of 64737671 is about 8045.9723464601. The cubic root of 64737671 is about 401.5309476064.

The spelling of 64737671 in words is "sixty-four million, seven hundred thirty-seven thousand, six hundred seventy-one".