61198243 has 2 divisors, whose sum is σ = 61198244. Its totient is φ = 61198242.

The previous prime is 61198217. The next prime is 61198253. The reversal of 61198243 is 34289116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61198243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61198199 and 61198208.

It is not a weakly prime, because it can be changed into another prime (61198213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30599121 + 30599122.

It is an arithmetic number, because the mean of its divisors is an integer number (30599122).

Almost surely, 2^61198243 is an apocalyptic number.

61198243 is a deficient number, since it is larger than the sum of its proper divisors (1).

61198243 is an equidigital number, since it uses as much as digits as its factorization.

61198243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 61198243 is about 7822.9305889801. The cubic root of 61198243 is about 394.0756959873.

The spelling of 61198243 in words is "sixty-one million, one hundred ninety-eight thousand, two hundred forty-three".