61172843 has 2 divisors, whose sum is σ = 61172844. Its totient is φ = 61172842.

The previous prime is 61172821. The next prime is 61172849. The reversal of 61172843 is 34827116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61172843 - 2¹⁰ = 61171819 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61172849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30586421 + 30586422.

It is an arithmetic number, because the mean of its divisors is an integer number (30586422).

Almost surely, 2^61172843 is an apocalyptic number.

61172843 is a deficient number, since it is larger than the sum of its proper divisors (1).

61172843 is an equidigital number, since it uses as much as digits as its factorization.

61172843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 61172843 is about 7821.3069879656. The cubic root of 61172843 is about 394.0211687803.

Adding to 61172843 its reverse (34827116), we get a palindrome (95999959).

The spelling of 61172843 in words is "sixty-one million, one hundred seventy-two thousand, eight hundred forty-three".