381843877 has 4 divisors (see below), whose sum is σ = 382082220. Its totient is φ = 381605536.

The previous prime is 381843871. The next prime is 381843881. The reversal of 381843877 is 778348183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134536801 + 247307076 = 11599^2 + 15726^2 .

It is a cyclic number.

It is not a de Polignac number, because 381843877 - 2¹¹ = 381841829 is a prime.

It is a super-2 number, since 2×381843877² = 291609492804782258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381843877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381843871) 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, 116752 + ... + 119977.

It is an arithmetic number, because the mean of its divisors is an integer number (95520555).

Almost surely, 2^381843877 is an apocalyptic number.

It is an amenable number.

381843877 is a deficient number, since it is larger than the sum of its proper divisors (238343).

381843877 is a wasteful number, since it uses less digits than its factorization.

381843877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238342.

The product of its digits is 903168, while the sum is 49.

The square root of 381843877 is about 19540.8259037329. The cubic root of 381843877 is about 725.4852887274.

The spelling of 381843877 in words is "three hundred eighty-one million, eight hundred forty-three thousand, eight hundred seventy-seven".