61541539 has 2 divisors, whose sum is σ = 61541540. Its totient is φ = 61541538.

The previous prime is 61541531. The next prime is 61541563. The reversal of 61541539 is 93514516.

61541539 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 61541539 - 2³ = 61541531 is a prime.

It is a super-2 number, since 2×61541539² = 7574722044977042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61541531) 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, 30770769 + 30770770.

It is an arithmetic number, because the mean of its divisors is an integer number (30770770).

Almost surely, 2^61541539 is an apocalyptic number.

61541539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61541539 is an equidigital number, since it uses as much as digits as its factorization.

61541539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 61541539 is about 7844.8415535306. The cubic root of 61541539 is about 394.8111878683.

The spelling of 61541539 in words is "sixty-one million, five hundred forty-one thousand, five hundred thirty-nine".