380218913 has 4 divisors (see below), whose sum is σ = 393329940. Its totient is φ = 367107888.

The previous prime is 380218901. The next prime is 380218921. The reversal of 380218913 is 319812083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319812083 = 349 ⋅916367.

It can be written as a sum of positive squares in 2 ways, for example, as 137077264 + 243141649 = 11708^2 + 15593^2 .

It is a cyclic number.

It is not a de Polignac number, because 380218913 - 2⁶ = 380218849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380218963) 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, 6555470 + ... + 6555527.

It is an arithmetic number, because the mean of its divisors is an integer number (98332485).

Almost surely, 2^380218913 is an apocalyptic number.

It is an amenable number.

380218913 is a deficient number, since it is larger than the sum of its proper divisors (13111027).

380218913 is a wasteful number, since it uses less digits than its factorization.

380218913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111026.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 380218913 is about 19499.2028811436. The cubic root of 380218913 is about 724.4547072142.

The spelling of 380218913 in words is "three hundred eighty million, two hundred eighteen thousand, nine hundred thirteen".