361338391 has 4 divisors (see below), whose sum is σ = 361475752. Its totient is φ = 361201032.

The previous prime is 361338389. The next prime is 361338403. The reversal of 361338391 is 193833163.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 361338391 - 2¹ = 361338389 is a prime.

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 361338391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361338301) 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, 64656 + ... + 70021.

It is an arithmetic number, because the mean of its divisors is an integer number (90368938).

Almost surely, 2^361338391 is an apocalyptic number.

361338391 is a deficient number, since it is larger than the sum of its proper divisors (137361).

361338391 is a wasteful number, since it uses less digits than its factorization.

361338391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137360.

The product of its digits is 34992, while the sum is 37.

The square root of 361338391 is about 19008.9029404645. The cubic root of 361338391 is about 712.2591473184.

The spelling of 361338391 in words is "three hundred sixty-one million, three hundred thirty-eight thousand, three hundred ninety-one".