361291405 has 4 divisors (see below), whose sum is σ = 433549692. Its totient is φ = 289033120.

The previous prime is 361291393. The next prime is 361291409. The reversal of 361291405 is 504192163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504192163 = 21871 ⋅23053.

It can be written as a sum of positive squares in 2 ways, for example, as 285914281 + 75377124 = 16909^2 + 8682^2 .

It is not a de Polignac number, because 361291405 - 2⁵ = 361291373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361291409) 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, 36129136 + ... + 36129145.

It is an arithmetic number, because the mean of its divisors is an integer number (108387423).

Almost surely, 2^361291405 is an apocalyptic number.

It is an amenable number.

361291405 is a deficient number, since it is larger than the sum of its proper divisors (72258287).

361291405 is an equidigital number, since it uses as much as digits as its factorization.

361291405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72258286.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 361291405 is about 19007.6670057111. The cubic root of 361291405 is about 712.2282735264.

The spelling of 361291405 in words is "three hundred sixty-one million, two hundred ninety-one thousand, four hundred five".