61541899 has 2 divisors, whose sum is σ = 61541900. Its totient is φ = 61541898.

The previous prime is 61541891. The next prime is 61541911. The reversal of 61541899 is 99814516.

61541899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61541899 - 2³ = 61541891 is a prime.

It is not a weakly prime, because it can be changed into another prime (61541891) 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, 30770949 + 30770950.

It is an arithmetic number, because the mean of its divisors is an integer number (30770950).

Almost surely, 2^61541899 is an apocalyptic number.

61541899 is a deficient number, since it is larger than the sum of its proper divisors (1).

61541899 is an equidigital number, since it uses as much as digits as its factorization.

61541899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 43.

The square root of 61541899 is about 7844.8644985111. The cubic root of 61541899 is about 394.8119577101.

The spelling of 61541899 in words is "sixty-one million, five hundred forty-one thousand, eight hundred ninety-nine".