61306123 has 2 divisors, whose sum is σ = 61306124. Its totient is φ = 61306122.

The previous prime is 61306121. The next prime is 61306153. The reversal of 61306123 is 32160316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61306123 - 2¹ = 61306121 is a prime.

It is a super-2 number, since 2×61306123² = 7516881434582258, which contains 22 as substring.

Together with 61306121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 61306094 and 61306103.

It is not a weakly prime, because it can be changed into another prime (61306121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30653061 + 30653062.

It is an arithmetic number, because the mean of its divisors is an integer number (30653062).

Almost surely, 2^61306123 is an apocalyptic number.

61306123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61306123 is an equidigital number, since it uses as much as digits as its factorization.

61306123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 61306123 is about 7829.8226672128. The cubic root of 61306123 is about 394.3071183720.

Adding to 61306123 its reverse (32160316), we get a palindrome (93466439).

The spelling of 61306123 in words is "sixty-one million, three hundred six thousand, one hundred twenty-three".