381120499 has 2 divisors, whose sum is σ = 381120500. Its totient is φ = 381120498.

The previous prime is 381120473. The next prime is 381120539. The reversal of 381120499 is 994021183.

It is a weak prime.

It is an emirp because it is prime and its reverse (994021183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381120499 - 2⁹ = 381119987 is a prime.

It is not a weakly prime, because it can be changed into another prime (381120409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190560249 + 190560250.

It is an arithmetic number, because the mean of its divisors is an integer number (190560250).

Almost surely, 2^381120499 is an apocalyptic number.

381120499 is a deficient number, since it is larger than the sum of its proper divisors (1).

381120499 is an equidigital number, since it uses as much as digits as its factorization.

381120499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 381120499 is about 19522.3077273154. The cubic root of 381120499 is about 725.0268711404.

It can be divided in two parts, 3811 and 20499, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 381120499 in words is "three hundred eighty-one million, one hundred twenty thousand, four hundred ninety-nine".