381262813 has 8 divisors (see below), whose sum is σ = 390846456. Its totient is φ = 371692800.

The previous prime is 381262799. The next prime is 381262823. The reversal of 381262813 is 318262183.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 110397049 + 270865764 = 10507^2 + 16458^2 .

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 381262813 - 2⁵ = 381262781 is a prime.

It is a super-2 number, since 2×381262813² = 290722665153345938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381262823) 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 7 ways as a sum of consecutive naturals, for example, 76003 + ... + 80863.

It is an arithmetic number, because the mean of its divisors is an integer number (48855807).

Almost surely, 2^381262813 is an apocalyptic number.

It is an amenable number.

381262813 is a deficient number, since it is larger than the sum of its proper divisors (9583643).

381262813 is a wasteful number, since it uses less digits than its factorization.

381262813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815.

The product of its digits is 13824, while the sum is 34.

The square root of 381262813 is about 19525.9522943185. The cubic root of 381262813 is about 725.1171038744.

The spelling of 381262813 in words is "three hundred eighty-one million, two hundred sixty-two thousand, eight hundred thirteen".