381148459 has 4 divisors (see below), whose sum is σ = 383277960. Its totient is φ = 379018960.

The previous prime is 381148451. The next prime is 381148477. The reversal of 381148459 is 954841183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954841183 = 25253 ⋅37811.

It is a cyclic number.

It is not a de Polignac number, because 381148459 - 2³ = 381148451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381148451) 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, 1064482 + ... + 1064839.

It is an arithmetic number, because the mean of its divisors is an integer number (95819490).

Almost surely, 2^381148459 is an apocalyptic number.

381148459 is a deficient number, since it is larger than the sum of its proper divisors (2129501).

381148459 is a wasteful number, since it uses less digits than its factorization.

381148459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129500.

The product of its digits is 138240, while the sum is 43.

The square root of 381148459 is about 19523.0238180462. The cubic root of 381148459 is about 725.0446006648.

The spelling of 381148459 in words is "three hundred eighty-one million, one hundred forty-eight thousand, four hundred fifty-nine".