61855193 has 2 divisors, whose sum is σ = 61855194. Its totient is φ = 61855192.

The previous prime is 61855181. The next prime is 61855201. The reversal of 61855193 is 39155816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54715609 + 7139584 = 7397^2 + 2672^2 .

It is a cyclic number.

It is not a de Polignac number, because 61855193 - 2⁴ = 61855177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61855153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30927596 + 30927597.

It is an arithmetic number, because the mean of its divisors is an integer number (30927597).

Almost surely, 2^61855193 is an apocalyptic number.

It is an amenable number.

61855193 is a deficient number, since it is larger than the sum of its proper divisors (1).

61855193 is an equidigital number, since it uses as much as digits as its factorization.

61855193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 61855193 is about 7864.8072449361. The cubic root of 61855193 is about 395.4807861343.

The spelling of 61855193 in words is "sixty-one million, eight hundred fifty-five thousand, one hundred ninety-three".