61917161 has 2 divisors, whose sum is σ = 61917162. Its totient is φ = 61917160.

The previous prime is 61917151. The next prime is 61917209. The reversal of 61917161 is 16171916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55591936 + 6325225 = 7456^2 + 2515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61917161 is a prime.

It is not a weakly prime, because it can be changed into another prime (61917131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30958580 + 30958581.

It is an arithmetic number, because the mean of its divisors is an integer number (30958581).

Almost surely, 2^61917161 is an apocalyptic number.

It is an amenable number.

61917161 is a deficient number, since it is larger than the sum of its proper divisors (1).

61917161 is an equidigital number, since it uses as much as digits as its factorization.

61917161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 61917161 is about 7868.7458339941. The cubic root of 61917161 is about 395.6128094012.

The spelling of 61917161 in words is "sixty-one million, nine hundred seventeen thousand, one hundred sixty-one".