61608389 has 2 divisors, whose sum is σ = 61608390. Its totient is φ = 61608388.

The previous prime is 61608347. The next prime is 61608397. The reversal of 61608389 is 98380616.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55383364 + 6225025 = 7442^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 61608389 - 2⁸ = 61608133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61608689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30804194 + 30804195.

It is an arithmetic number, because the mean of its divisors is an integer number (30804195).

Almost surely, 2^61608389 is an apocalyptic number.

It is an amenable number.

61608389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61608389 is an equidigital number, since it uses as much as digits as its factorization.

61608389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 61608389 is about 7849.1011587315. The cubic root of 61608389 is about 394.9540917644.

The spelling of 61608389 in words is "sixty-one million, six hundred eight thousand, three hundred eighty-nine".