61959613 has 2 divisors, whose sum is σ = 61959614. Its totient is φ = 61959612.

The previous prime is 61959587. The next prime is 61959629. The reversal of 61959613 is 31695916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40411449 + 21548164 = 6357^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 61959613 - 2⁵ = 61959581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61959643) 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, 30979806 + 30979807.

It is an arithmetic number, because the mean of its divisors is an integer number (30979807).

Almost surely, 2^61959613 is an apocalyptic number.

It is an amenable number.

61959613 is a deficient number, since it is larger than the sum of its proper divisors (1).

61959613 is an equidigital number, since it uses as much as digits as its factorization.

61959613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 40.

The square root of 61959613 is about 7871.4428791677. The cubic root of 61959613 is about 395.7032028555.

The spelling of 61959613 in words is "sixty-one million, nine hundred fifty-nine thousand, six hundred thirteen".