61944671 has 2 divisors, whose sum is σ = 61944672. Its totient is φ = 61944670.

The previous prime is 61944647. The next prime is 61944683. The reversal of 61944671 is 17644916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61944671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61944601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30972335 + 30972336.

It is an arithmetic number, because the mean of its divisors is an integer number (30972336).

Almost surely, 2^61944671 is an apocalyptic number.

61944671 is a deficient number, since it is larger than the sum of its proper divisors (1).

61944671 is an equidigital number, since it uses as much as digits as its factorization.

61944671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 61944671 is about 7870.4936948072. The cubic root of 61944671 is about 395.6713914205.

The spelling of 61944671 in words is "sixty-one million, nine hundred forty-four thousand, six hundred seventy-one".