381269999 has 16 divisors (see below), whose sum is σ = 446985216. Its totient is φ = 321340800.

The previous prime is 381269981. The next prime is 381270031. The reversal of 381269999 is 999962183.

It is not a de Polignac number, because 381269999 - 2¹⁶ = 381204463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381209999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2687 + ... + 27744.

It is an arithmetic number, because the mean of its divisors is an integer number (27936576).

Almost surely, 2^381269999 is an apocalyptic number.

381269999 is a deficient number, since it is larger than the sum of its proper divisors (65715217).

381269999 is a wasteful number, since it uses less digits than its factorization.

381269999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30526.

The product of its digits is 1889568, while the sum is 56.

The square root of 381269999 is about 19526.1363049632. The cubic root of 381269999 is about 725.1216594885.

The spelling of 381269999 in words is "three hundred eighty-one million, two hundred sixty-nine thousand, nine hundred ninety-nine".