61307879 has 2 divisors, whose sum is σ = 61307880. Its totient is φ = 61307878.

The previous prime is 61307839. The next prime is 61307891. The reversal of 61307879 is 97870316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61307879 - 2¹⁶ = 61242343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61307839) 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, 30653939 + 30653940.

It is an arithmetic number, because the mean of its divisors is an integer number (30653940).

Almost surely, 2^61307879 is an apocalyptic number.

61307879 is a deficient number, since it is larger than the sum of its proper divisors (1).

61307879 is an equidigital number, since it uses as much as digits as its factorization.

61307879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 61307879 is about 7829.9348017720. The cubic root of 61307879 is about 394.3108830677.

The spelling of 61307879 in words is "sixty-one million, three hundred seven thousand, eight hundred seventy-nine".