61791671 has 2 divisors, whose sum is σ = 61791672. Its totient is φ = 61791670.

The previous prime is 61791647. The next prime is 61791673. The reversal of 61791671 is 17619716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61791671 - 2⁶ = 61791607 is a prime.

Together with 61791673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61791673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30895835 + 30895836.

It is an arithmetic number, because the mean of its divisors is an integer number (30895836).

Almost surely, 2^61791671 is an apocalyptic number.

61791671 is a deficient number, since it is larger than the sum of its proper divisors (1).

61791671 is an equidigital number, since it uses as much as digits as its factorization.

61791671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 38.

The square root of 61791671 is about 7860.7678378133. The cubic root of 61791671 is about 395.3453605069.

The spelling of 61791671 in words is "sixty-one million, seven hundred ninety-one thousand, six hundred seventy-one".