368991111 has 4 divisors (see below), whose sum is σ = 491988152. Its totient is φ = 245994072.

The previous prime is 368991097. The next prime is 368991143. The reversal of 368991111 is 111199863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111199863 = 3 ⋅37066621.

It is not a de Polignac number, because 368991111 - 2¹³ = 368982919 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 368991111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (368991811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61498516 + ... + 61498521.

It is an arithmetic number, because the mean of its divisors is an integer number (122997038).

Almost surely, 2^368991111 is an apocalyptic number.

368991111 is a deficient number, since it is larger than the sum of its proper divisors (122997041).

368991111 is a wasteful number, since it uses less digits than its factorization.

368991111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122997040.

The product of its digits is 11664, while the sum is 39.

The square root of 368991111 is about 19209.1413394769. The cubic root of 368991111 is about 717.2523305162.

The spelling of 368991111 in words is "three hundred sixty-eight million, nine hundred ninety-one thousand, one hundred eleven".