61798123 has 2 divisors, whose sum is σ = 61798124. Its totient is φ = 61798122.

The previous prime is 61798039. The next prime is 61798133. The reversal of 61798123 is 32189716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61798123 - 2⁹ = 61797611 is a prime.

It is not a weakly prime, because it can be changed into another prime (61798133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30899061 + 30899062.

It is an arithmetic number, because the mean of its divisors is an integer number (30899062).

Almost surely, 2^61798123 is an apocalyptic number.

61798123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61798123 is an equidigital number, since it uses as much as digits as its factorization.

61798123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 61798123 is about 7861.1782195801. The cubic root of 61798123 is about 395.3591200716.

The spelling of 61798123 in words is "sixty-one million, seven hundred ninety-eight thousand, one hundred twenty-three".