61112291 has 2 divisors, whose sum is σ = 61112292. Its totient is φ = 61112290.

The previous prime is 61112243. The next prime is 61112333. The reversal of 61112291 is 19221116.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61112291 is a prime.

It is a super-2 number, since 2×61112291² = 7469424222537362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61111291) 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, 30556145 + 30556146.

It is an arithmetic number, because the mean of its divisors is an integer number (30556146).

Almost surely, 2^61112291 is an apocalyptic number.

61112291 is a deficient number, since it is larger than the sum of its proper divisors (1).

61112291 is an equidigital number, since it uses as much as digits as its factorization.

61112291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 23.

The square root of 61112291 is about 7817.4350652884. The cubic root of 61112291 is about 393.8911184443.

The spelling of 61112291 in words is "sixty-one million, one hundred twelve thousand, two hundred ninety-one".