61609123 has 2 divisors, whose sum is σ = 61609124. Its totient is φ = 61609122.

The previous prime is 61609117. The next prime is 61609129. The reversal of 61609123 is 32190616.

It is a balanced prime because it is at equal distance from previous prime (61609117) and next prime (61609129).

It is a cyclic number.

It is not a de Polignac number, because 61609123 - 2¹⁷ = 61478051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61609091 and 61609100.

It is not a weakly prime, because it can be changed into another prime (61609129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30804561 + 30804562.

It is an arithmetic number, because the mean of its divisors is an integer number (30804562).

Almost surely, 2^61609123 is an apocalyptic number.

61609123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61609123 is an equidigital number, since it uses as much as digits as its factorization.

61609123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 61609123 is about 7849.1479155383. The cubic root of 61609123 is about 394.9556602475.

Adding to 61609123 its reverse (32190616), we get a palindrome (93799739).

The spelling of 61609123 in words is "sixty-one million, six hundred nine thousand, one hundred twenty-three".