61561327 has 2 divisors, whose sum is σ = 61561328. Its totient is φ = 61561326.

The previous prime is 61561321. The next prime is 61561343. The reversal of 61561327 is 72316516.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61561327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61561321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30780663 + 30780664.

It is an arithmetic number, because the mean of its divisors is an integer number (30780664).

Almost surely, 2^61561327 is an apocalyptic number.

61561327 is a deficient number, since it is larger than the sum of its proper divisors (1).

61561327 is an equidigital number, since it uses as much as digits as its factorization.

61561327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 61561327 is about 7846.1026631061. The cubic root of 61561327 is about 394.8534990547.

The spelling of 61561327 in words is "sixty-one million, five hundred sixty-one thousand, three hundred twenty-seven".