381305069 has 4 divisors (see below), whose sum is σ = 381528096. Its totient is φ = 381082044.

The previous prime is 381305009. The next prime is 381305077. The reversal of 381305069 is 960503183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381305069 - 2⁸ = 381304813 is a prime.

It is a super-2 number, since 2×381305069² = 290787111290189522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381305009) 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, 108929 + ... + 112374.

It is an arithmetic number, because the mean of its divisors is an integer number (95382024).

Almost surely, 2^381305069 is an apocalyptic number.

It is an amenable number.

381305069 is a deficient number, since it is larger than the sum of its proper divisors (223027).

381305069 is a wasteful number, since it uses less digits than its factorization.

381305069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223026.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 381305069 is about 19527.0343114360. The cubic root of 381305069 is about 725.1438915349.

The spelling of 381305069 in words is "three hundred eighty-one million, three hundred five thousand, sixty-nine".