61617427 has 2 divisors, whose sum is σ = 61617428. Its totient is φ = 61617426.

The previous prime is 61617397. The next prime is 61617467. The reversal of 61617427 is 72471616.

It is a happy number.

61617427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61617427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61617392 and 61617401.

It is not a weakly prime, because it can be changed into another prime (61617467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30808713 + 30808714.

It is an arithmetic number, because the mean of its divisors is an integer number (30808714).

Almost surely, 2^61617427 is an apocalyptic number.

61617427 is a deficient number, since it is larger than the sum of its proper divisors (1).

61617427 is an equidigital number, since it uses as much as digits as its factorization.

61617427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 61617427 is about 7849.6768723305. The cubic root of 61617427 is about 394.9734041806.

The spelling of 61617427 in words is "sixty-one million, six hundred seventeen thousand, four hundred twenty-seven".