380720191 has 4 divisors (see below), whose sum is σ = 383626584. Its totient is φ = 377813800.

The previous prime is 380720189. The next prime is 380720203. The reversal of 380720191 is 191027083.

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 380720191 - 2¹ = 380720189 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380720111) 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, 1453000 + ... + 1453261.

It is an arithmetic number, because the mean of its divisors is an integer number (95906646).

Almost surely, 2^380720191 is an apocalyptic number.

380720191 is a deficient number, since it is larger than the sum of its proper divisors (2906393).

380720191 is a wasteful number, since it uses less digits than its factorization.

380720191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906392.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 380720191 is about 19512.0524548290. The cubic root of 380720191 is about 724.7729394380.

The spelling of 380720191 in words is "three hundred eighty million, seven hundred twenty thousand, one hundred ninety-one".