61321079 has 2 divisors, whose sum is σ = 61321080. Its totient is φ = 61321078.

The previous prime is 61321049. The next prime is 61321087. The reversal of 61321079 is 97012316.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61321079 is a prime.

It is a Chen prime.

It is equal to p_3635813 and since 61321079 and 3635813 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 (61321009) 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, 30660539 + 30660540.

It is an arithmetic number, because the mean of its divisors is an integer number (30660540).

Almost surely, 2^61321079 is an apocalyptic number.

61321079 is a deficient number, since it is larger than the sum of its proper divisors (1).

61321079 is an equidigital number, since it uses as much as digits as its factorization.

61321079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 61321079 is about 7830.7776753015. Note that the first 3 decimals coincide. The cubic root of 61321079 is about 394.3391803014.

The spelling of 61321079 in words is "sixty-one million, three hundred twenty-one thousand, seventy-nine".