612198091 has 8 divisors (see below), whose sum is σ = 634751280. Its totient is φ = 589741152.

The previous prime is 612198089. The next prime is 612198131. The reversal of 612198091 is 190891216.

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 612198091 - 2¹ = 612198089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 612198091.

It is not an unprimeable number, because it can be changed into a prime (612198011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10980 + ... + 36673.

It is an arithmetic number, because the mean of its divisors is an integer number (79343910).

Almost surely, 2^612198091 is an apocalyptic number.

612198091 is a deficient number, since it is larger than the sum of its proper divisors (22553189).

612198091 is a wasteful number, since it uses less digits than its factorization.

612198091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48125.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 612198091 is about 24742.6371068243. The cubic root of 612198091 is about 849.1100678929.

The spelling of 612198091 in words is "six hundred twelve million, one hundred ninety-eight thousand, ninety-one".