381361061 has 4 divisors (see below), whose sum is σ = 384364032. Its totient is φ = 378358092.

The previous prime is 381360971. The next prime is 381361063. The reversal of 381361061 is 160163183.

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 381361061 - 2¹⁸ = 381098917 is a prime.

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 (381361063) 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 3 ways as a sum of consecutive naturals, for example, 1501295 + ... + 1501548.

It is an arithmetic number, because the mean of its divisors is an integer number (96091008).

Almost surely, 2^381361061 is an apocalyptic number.

It is an amenable number.

381361061 is a deficient number, since it is larger than the sum of its proper divisors (3002971).

381361061 is a wasteful number, since it uses less digits than its factorization.

381361061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002970.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 381361061 is about 19528.4679634630. The cubic root of 381361061 is about 725.1793839117.

The spelling of 381361061 in words is "three hundred eighty-one million, three hundred sixty-one thousand, sixty-one".