61111129 has 2 divisors, whose sum is σ = 61111130. Its totient is φ = 61111128.

The previous prime is 61111121. The next prime is 61111133. The reversal of 61111129 is 92111116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 10017225 = 7148^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 61111129 - 2³ = 61111121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61111121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555564 + 30555565.

It is an arithmetic number, because the mean of its divisors is an integer number (30555565).

Almost surely, 2^61111129 is an apocalyptic number.

It is an amenable number.

61111129 is a deficient number, since it is larger than the sum of its proper divisors (1).

61111129 is an equidigital number, since it uses as much as digits as its factorization.

61111129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 22.

The square root of 61111129 is about 7817.3607438828. The cubic root of 61111129 is about 393.8886219231. Note that the first 3 decimals are identical.

The spelling of 61111129 in words is "sixty-one million, one hundred eleven thousand, one hundred twenty-nine".