61611959 has 2 divisors, whose sum is σ = 61611960. Its totient is φ = 61611958.

The previous prime is 61611937. The next prime is 61612027. The reversal of 61611959 is 95911616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61611959 - 2⁸ = 61611703 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61611059) 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, 30805979 + 30805980.

It is an arithmetic number, because the mean of its divisors is an integer number (30805980).

Almost surely, 2^61611959 is an apocalyptic number.

61611959 is a deficient number, since it is larger than the sum of its proper divisors (1).

61611959 is an equidigital number, since it uses as much as digits as its factorization.

61611959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 38.

The square root of 61611959 is about 7849.3285700116. The cubic root of 61611959 is about 394.9617203731.

The spelling of 61611959 in words is "sixty-one million, six hundred eleven thousand, nine hundred fifty-nine".