361240609 has 4 divisors (see below), whose sum is σ = 363112516. Its totient is φ = 359368704.

The previous prime is 361240603. The next prime is 361240631. The reversal of 361240609 is 906042163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906042163 = 13 ⋅69695551.

It can be written as a sum of positive squares in 2 ways, for example, as 265592209 + 95648400 = 16297^2 + 9780^2 .

It is a cyclic number.

It is not a de Polignac number, because 361240609 - 2³ = 361240601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (361240601) 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, 935664 + ... + 936049.

It is an arithmetic number, because the mean of its divisors is an integer number (90778129).

Almost surely, 2^361240609 is an apocalyptic number.

It is an amenable number.

361240609 is a deficient number, since it is larger than the sum of its proper divisors (1871907).

361240609 is a wasteful number, since it uses less digits than its factorization.

361240609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871906.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 361240609 is about 19006.3307610912. The cubic root of 361240609 is about 712.1948932296.

The spelling of 361240609 in words is "three hundred sixty-one million, two hundred forty thousand, six hundred nine".