61596109 has 2 divisors, whose sum is σ = 61596110. Its totient is φ = 61596108.

The previous prime is 61596107. The next prime is 61596127. The reversal of 61596109 is 90169516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 3988009 = 7590^2 + 1997^2 .

It is a cyclic number.

It is not a de Polignac number, because 61596109 - 2¹ = 61596107 is a prime.

Together with 61596107, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61596107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30798054 + 30798055.

It is an arithmetic number, because the mean of its divisors is an integer number (30798055).

Almost surely, 2^61596109 is an apocalyptic number.

It is an amenable number.

61596109 is a deficient number, since it is larger than the sum of its proper divisors (1).

61596109 is an equidigital number, since it uses as much as digits as its factorization.

61596109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 61596109 is about 7848.3188645722. The cubic root of 61596109 is about 394.9278488095.

The spelling of 61596109 in words is "sixty-one million, five hundred ninety-six thousand, one hundred nine".