61291193 has 2 divisors, whose sum is σ = 61291194. Its totient is φ = 61291192.

The previous prime is 61291177. The next prime is 61291199. The reversal of 61291193 is 39119216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36808489 + 24482704 = 6067^2 + 4948^2 .

It is a cyclic number.

It is not a de Polignac number, because 61291193 - 2⁴ = 61291177 is a prime.

It is a super-2 number, since 2×61291193² = 7513220678726498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61291199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30645596 + 30645597.

It is an arithmetic number, because the mean of its divisors is an integer number (30645597).

Almost surely, 2^61291193 is an apocalyptic number.

It is an amenable number.

61291193 is a deficient number, since it is larger than the sum of its proper divisors (1).

61291193 is an equidigital number, since it uses as much as digits as its factorization.

61291193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 61291193 is about 7828.8692031481. The cubic root of 61291193 is about 394.2751069788.

The spelling of 61291193 in words is "sixty-one million, two hundred ninety-one thousand, one hundred ninety-three".