61727879 has 2 divisors, whose sum is σ = 61727880. Its totient is φ = 61727878.

The previous prime is 61727857. The next prime is 61727893. The reversal of 61727879 is 97872716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61727879 - 2²⁴ = 44950663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61727849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30863939 + 30863940.

It is an arithmetic number, because the mean of its divisors is an integer number (30863940).

Almost surely, 2^61727879 is an apocalyptic number.

61727879 is a deficient number, since it is larger than the sum of its proper divisors (1).

61727879 is an equidigital number, since it uses as much as digits as its factorization.

61727879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 61727879 is about 7856.7091711479. The cubic root of 61727879 is about 395.2092658166.

The spelling of 61727879 in words is "sixty-one million, seven hundred twenty-seven thousand, eight hundred seventy-nine".