61111579 has 2 divisors, whose sum is σ = 61111580. Its totient is φ = 61111578.

The previous prime is 61111559. The next prime is 61111591. The reversal of 61111579 is 97511116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61111579 - 2¹⁵ = 61078811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61111579.

It is not a weakly prime, because it can be changed into another prime (61111559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555789 + 30555790.

It is an arithmetic number, because the mean of its divisors is an integer number (30555790).

Almost surely, 2^61111579 is an apocalyptic number.

61111579 is a deficient number, since it is larger than the sum of its proper divisors (1).

61111579 is an equidigital number, since it uses as much as digits as its factorization.

61111579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 31.

The square root of 61111579 is about 7817.3895259223. The cubic root of 61111579 is about 393.8895887380.

The spelling of 61111579 in words is "sixty-one million, one hundred eleven thousand, five hundred seventy-nine".