381564013 has 8 divisors (see below), whose sum is σ = 389587968. Its totient is φ = 373570704.

The previous prime is 381563989. The next prime is 381564037. The reversal of 381564013 is 310465183.

It is an interprime number because it is at equal distance from previous prime (381563989) and next prime (381564037).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381564013 - 2²⁵ = 348009581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381564613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18420 + ... + 33202.

It is an arithmetic number, because the mean of its divisors is an integer number (48698496).

Almost surely, 2^381564013 is an apocalyptic number.

It is an amenable number.

381564013 is a deficient number, since it is larger than the sum of its proper divisors (8023955).

381564013 is a wasteful number, since it uses less digits than its factorization.

381564013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15323.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 381564013 is about 19533.6635836701. The cubic root of 381564013 is about 725.3080026242.

The spelling of 381564013 in words is "three hundred eighty-one million, five hundred sixty-four thousand, thirteen".