361874021 has 4 divisors (see below), whose sum is σ = 367806444. Its totient is φ = 355941600.

The previous prime is 361873997. The next prime is 361874033. The reversal of 361874021 is 120478163.

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 205348900 + 156525121 = 14330^2 + 12511^2 .

It is a cyclic number.

It is not a de Polignac number, because 361874021 - 2²² = 357679717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361874041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966120 + ... + 2966241.

It is an arithmetic number, because the mean of its divisors is an integer number (91951611).

Almost surely, 2^361874021 is an apocalyptic number.

It is an amenable number.

361874021 is a deficient number, since it is larger than the sum of its proper divisors (5932423).

361874021 is an equidigital number, since it uses as much as digits as its factorization.

361874021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932422.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 361874021 is about 19022.9866477375. The cubic root of 361874021 is about 712.6109127019.

The spelling of 361874021 in words is "three hundred sixty-one million, eight hundred seventy-four thousand, twenty-one".