361727281 has 4 divisors (see below), whose sum is σ = 371503732. Its totient is φ = 351950832.

The previous prime is 361727273. The next prime is 361727293. The reversal of 361727281 is 182727163.

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 327610000 + 34117281 = 18100^2 + 5841^2 .

It is a cyclic number.

It is not a de Polignac number, because 361727281 - 2³ = 361727273 is a prime.

It is a super-2 number, since 2×361727281² = 261693251639305922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 9776413 = 361727281 / (3 + 6 + 1 + 7 + 2 + 7 + 2 + 8 + 1).

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 361727281.

It is not an unprimeable number, because it can be changed into a prime (361727081) 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, 4888170 + ... + 4888243.

It is an arithmetic number, because the mean of its divisors is an integer number (92875933).

Almost surely, 2^361727281 is an apocalyptic number.

It is an amenable number.

361727281 is a deficient number, since it is larger than the sum of its proper divisors (9776451).

361727281 is an equidigital number, since it uses as much as digits as its factorization.

361727281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776450.

The product of its digits is 28224, while the sum is 37.

The square root of 361727281 is about 19019.1293439001. The cubic root of 361727281 is about 712.5145783823.

The spelling of 361727281 in words is "three hundred sixty-one million, seven hundred twenty-seven thousand, two hundred eighty-one".