361621306 has 4 divisors (see below), whose sum is σ = 542431962. Its totient is φ = 180810652.

The previous prime is 361621301. The next prime is 361621321. The reversal of 361621306 is 603126163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603126163 = 151 ⋅3994213.

It can be written as a sum of positive squares in only one way, i.e., 351000225 + 10621081 = 18735^2 + 3259^2 .

It is not an unprimeable number, because it can be changed into a prime (361621301) 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 as a sum of consecutive naturals, namely, 90405325 + ... + 90405328.

Almost surely, 2^361621306 is an apocalyptic number.

361621306 is a deficient number, since it is larger than the sum of its proper divisors (180810656).

361621306 is a wasteful number, since it uses less digits than its factorization.

361621306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180810655.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 361621306 is about 19016.3431290035. The cubic root of 361621306 is about 712.4449899460. Note that the first 3 decimals are identical.

Adding to 361621306 its reverse (603126163), we get a palindrome (964747469).

The spelling of 361621306 in words is "three hundred sixty-one million, six hundred twenty-one thousand, three hundred six".