61606439 has 2 divisors, whose sum is σ = 61606440. Its totient is φ = 61606438.

The previous prime is 61606421. The next prime is 61606459. The reversal of 61606439 is 93460616.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61606439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61606399 and 61606408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61606409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803219 + 30803220.

It is an arithmetic number, because the mean of its divisors is an integer number (30803220).

Almost surely, 2^61606439 is an apocalyptic number.

61606439 is a deficient number, since it is larger than the sum of its proper divisors (1).

61606439 is an equidigital number, since it uses as much as digits as its factorization.

61606439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 61606439 is about 7848.9769397037. The cubic root of 61606439 is about 394.9499247529.

The spelling of 61606439 in words is "sixty-one million, six hundred six thousand, four hundred thirty-nine".