61197679 has 2 divisors, whose sum is σ = 61197680. Its totient is φ = 61197678.

The previous prime is 61197677. The next prime is 61197709. The reversal of 61197679 is 97679116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61197679 - 2¹ = 61197677 is a prime.

Together with 61197677, 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 (61197673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30598839 + 30598840.

It is an arithmetic number, because the mean of its divisors is an integer number (30598840).

Almost surely, 2^61197679 is an apocalyptic number.

61197679 is a deficient number, since it is larger than the sum of its proper divisors (1).

61197679 is an equidigital number, since it uses as much as digits as its factorization.

61197679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 46.

The square root of 61197679 is about 7822.8945410251. The cubic root of 61197679 is about 394.0744853895.

The spelling of 61197679 in words is "sixty-one million, one hundred ninety-seven thousand, six hundred seventy-nine".