61161671 has 2 divisors, whose sum is σ = 61161672. Its totient is φ = 61161670.

The previous prime is 61161649. The next prime is 61161679. The reversal of 61161671 is 17616116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61161671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61161679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30580835 + 30580836.

It is an arithmetic number, because the mean of its divisors is an integer number (30580836).

Almost surely, 2^61161671 is an apocalyptic number.

61161671 is a deficient number, since it is larger than the sum of its proper divisors (1).

61161671 is an equidigital number, since it uses as much as digits as its factorization.

61161671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 61161671 is about 7820.5927524709. The cubic root of 61161671 is about 393.9971806166.

Adding to 61161671 its reverse (17616116), we get a palindrome (78777787).

The spelling of 61161671 in words is "sixty-one million, one hundred sixty-one thousand, six hundred seventy-one".