612606385 has 4 divisors (see below), whose sum is σ = 735127668. Its totient is φ = 490085104.

The previous prime is 612606377. The next prime is 612606427. The reversal of 612606385 is 583606216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 163123984 + 449482401 = 12772^2 + 21201^2 .

It is a cyclic number.

It is not a de Polignac number, because 612606385 - 2³ = 612606377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61260634 + ... + 61260643.

It is an arithmetic number, because the mean of its divisors is an integer number (183781917).

Almost surely, 2^612606385 is an apocalyptic number.

It is an amenable number.

612606385 is a deficient number, since it is larger than the sum of its proper divisors (122521283).

612606385 is a wasteful number, since it uses less digits than its factorization.

612606385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122521282.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 612606385 is about 24750.8865497784. The cubic root of 612606385 is about 849.2987919392.

The spelling of 612606385 in words is "six hundred twelve million, six hundred six thousand, three hundred eighty-five".