380720399 has 2 divisors, whose sum is σ = 380720400. Its totient is φ = 380720398.

The previous prime is 380720387. The next prime is 380720401. The reversal of 380720399 is 993027083.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 380720399 - 2¹⁶ = 380654863 is a prime.

Together with 380720401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380720339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190360199 + 190360200.

It is an arithmetic number, because the mean of its divisors is an integer number (190360200).

Almost surely, 2^380720399 is an apocalyptic number.

380720399 is a deficient number, since it is larger than the sum of its proper divisors (1).

380720399 is an equidigital number, since it uses as much as digits as its factorization.

380720399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 380720399 is about 19512.0577848673. The cubic root of 380720399 is about 724.7730714271.

The spelling of 380720399 in words is "three hundred eighty million, seven hundred twenty thousand, three hundred ninety-nine".