61561193 has 2 divisors, whose sum is σ = 61561194. Its totient is φ = 61561192.

The previous prime is 61561187. The next prime is 61561219. The reversal of 61561193 is 39116516.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45657049 + 15904144 = 6757^2 + 3988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61561193 is a prime.

It is a super-3 number, since 3×61561193³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (61561103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30780596 + 30780597.

It is an arithmetic number, because the mean of its divisors is an integer number (30780597).

Almost surely, 2^61561193 is an apocalyptic number.

It is an amenable number.

61561193 is a deficient number, since it is larger than the sum of its proper divisors (1).

61561193 is an equidigital number, since it uses as much as digits as its factorization.

61561193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 61561193 is about 7846.0941238300. The cubic root of 61561193 is about 394.8532125632.

The spelling of 61561193 in words is "sixty-one million, five hundred sixty-one thousand, one hundred ninety-three".