612354861 has 6 divisors (see below), whose sum is σ = 884512590. Its totient is φ = 408236568.

The previous prime is 612354859. The next prime is 612354871. The reversal of 612354861 is 168453216.

It is a happy number.

612354861 is a `hidden beast` number, since 612 + 35 + 4 + 8 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 392277636 + 220077225 = 19806^2 + 14835^2 .

It is not a de Polignac number, because 612354861 - 2¹ = 612354859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612354871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34019706 + ... + 34019723.

It is an arithmetic number, because the mean of its divisors is an integer number (147418765).

Almost surely, 2^612354861 is an apocalyptic number.

It is an amenable number.

612354861 is a deficient number, since it is larger than the sum of its proper divisors (272157729).

612354861 is a wasteful number, since it uses less digits than its factorization.

612354861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68039435 (or 68039432 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 612354861 is about 24745.8049171976. The cubic root of 612354861 is about 849.1825409624.

The spelling of 612354861 in words is "six hundred twelve million, three hundred fifty-four thousand, eight hundred sixty-one".