613745123 has 2 divisors, whose sum is σ = 613745124. Its totient is φ = 613745122.

The previous prime is 613745089. The next prime is 613745137. The reversal of 613745123 is 321547316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613745123 - 2¹² = 613741027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 613745123.

It is not a weakly prime, because it can be changed into another prime (613735123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306872561 + 306872562.

It is an arithmetic number, because the mean of its divisors is an integer number (306872562).

Almost surely, 2^613745123 is an apocalyptic number.

613745123 is a deficient number, since it is larger than the sum of its proper divisors (1).

613745123 is an equidigital number, since it uses as much as digits as its factorization.

613745123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 613745123 is about 24773.8798535877. The cubic root of 613745123 is about 849.8247034126.

The spelling of 613745123 in words is "six hundred thirteen million, seven hundred forty-five thousand, one hundred twenty-three".