612989 has 8 divisors (see below), whose sum is σ = 671832. Its totient is φ = 555840.

The previous prime is 612977. The next prime is 613007. The reversal of 612989 is 989216.

It can be written as a sum of positive squares in 4 ways, for example, as 80089 + 532900 = 283^2 + 730^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 612989 - 2¹⁶ = 547453 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (83979).

2⁶¹²⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

612989 is a deficient number, since it is larger than the sum of its proper divisors (58843).

612989 is a wasteful number, since it uses less digits than its factorization.

612989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its digits is 7776, while the sum is 35.

The square root of 612989 is about 782.9361404355. The cubic root of 612989 is about 84.9475570393.

It can be divided in two parts, 61 and 2989, that multiplied together give a square (182329 = 427²).

The spelling of 612989 in words is "six hundred twelve thousand, nine hundred eighty-nine".