612557723 has 4 divisors (see below), whose sum is σ = 614293368. Its totient is φ = 610822080.

The previous prime is 612557713. The next prime is 612557731. The reversal of 612557723 is 327755216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 612557723 - 2⁴ = 612557707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612557713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867293 + ... + 867998.

It is an arithmetic number, because the mean of its divisors is an integer number (153573342).

Almost surely, 2^612557723 is an apocalyptic number.

612557723 is a deficient number, since it is larger than the sum of its proper divisors (1735645).

612557723 is a wasteful number, since it uses less digits than its factorization.

612557723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735644.

The product of its digits is 88200, while the sum is 38.

The square root of 612557723 is about 24749.9034947613. The cubic root of 612557723 is about 849.2763035066.

The spelling of 612557723 in words is "six hundred twelve million, five hundred fifty-seven thousand, seven hundred twenty-three".