612165397 has 4 divisors (see below), whose sum is σ = 613692396. Its totient is φ = 610638400.

The previous prime is 612165373. The next prime is 612165413. The reversal of 612165397 is 793561216.

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 600936196 + 11229201 = 24514^2 + 3351^2 .

It is a cyclic number.

It is not a de Polignac number, because 612165397 - 2¹⁵ = 612132629 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612165497) 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, 762898 + ... + 763699.

It is an arithmetic number, because the mean of its divisors is an integer number (153423099).

Almost surely, 2^612165397 is an apocalyptic number.

It is an amenable number.

612165397 is a deficient number, since it is larger than the sum of its proper divisors (1526999).

612165397 is a wasteful number, since it uses less digits than its factorization.

612165397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526998.

The product of its digits is 68040, while the sum is 40.

The square root of 612165397 is about 24741.9764166083. The cubic root of 612165397 is about 849.0949522525.

The spelling of 612165397 in words is "six hundred twelve million, one hundred sixty-five thousand, three hundred ninety-seven".