61019911 has 2 divisors, whose sum is σ = 61019912. Its totient is φ = 61019910.

The previous prime is 61019899. The next prime is 61019921. The reversal of 61019911 is 11991016.

61019911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61019911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61019911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61019921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30509955 + 30509956.

It is an arithmetic number, because the mean of its divisors is an integer number (30509956).

Almost surely, 2^61019911 is an apocalyptic number.

61019911 is a deficient number, since it is larger than the sum of its proper divisors (1).

61019911 is an equidigital number, since it uses as much as digits as its factorization.

61019911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 61019911 is about 7811.5242430655. The cubic root of 61019911 is about 393.6925440310.

The spelling of 61019911 in words is "sixty-one million, nineteen thousand, nine hundred eleven".