61619123 has 2 divisors, whose sum is σ = 61619124. Its totient is φ = 61619122.

The previous prime is 61619111. The next prime is 61619143. The reversal of 61619123 is 32191616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61619123 - 2¹⁰ = 61618099 is a prime.

It is not a weakly prime, because it can be changed into another prime (61619143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30809561 + 30809562.

It is an arithmetic number, because the mean of its divisors is an integer number (30809562).

Almost surely, 2^61619123 is an apocalyptic number.

61619123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61619123 is an equidigital number, since it uses as much as digits as its factorization.

61619123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 61619123 is about 7849.7849015116. The cubic root of 61619123 is about 394.9770279863.

The spelling of 61619123 in words is "sixty-one million, six hundred nineteen thousand, one hundred twenty-three".