612628609 has 8 divisors (see below), whose sum is σ = 682806240. Its totient is φ = 546244416.

The previous prime is 612628579. The next prime is 612628619. The reversal of 612628609 is 906826216.

It is a happy number.

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 612628609 - 2⁹ = 612628097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612628619) 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, 948019 + ... + 948664.

It is an arithmetic number, because the mean of its divisors is an integer number (85350780).

Almost surely, 2^612628609 is an apocalyptic number.

It is an amenable number.

612628609 is a deficient number, since it is larger than the sum of its proper divisors (70177631).

612628609 is a wasteful number, since it uses less digits than its factorization.

612628609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896719.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 612628609 is about 24751.3354993221. The cubic root of 612628609 is about 849.3090620401.

The spelling of 612628609 in words is "six hundred twelve million, six hundred twenty-eight thousand, six hundred nine".