381116487 has 4 divisors (see below), whose sum is σ = 508155320. Its totient is φ = 254077656.

The previous prime is 381116479. The next prime is 381116501. The reversal of 381116487 is 784611183.

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

It is not a de Polignac number, because 381116487 - 2³ = 381116479 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 (381116447) 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, 63519412 + ... + 63519417.

It is an arithmetic number, because the mean of its divisors is an integer number (127038830).

Almost surely, 2^381116487 is an apocalyptic number.

381116487 is a deficient number, since it is larger than the sum of its proper divisors (127038833).

381116487 is a wasteful number, since it uses less digits than its factorization.

381116487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127038832.

The product of its digits is 32256, while the sum is 39.

The square root of 381116487 is about 19522.2049727996. The cubic root of 381116487 is about 725.0243270474.

The spelling of 381116487 in words is "three hundred eighty-one million, one hundred sixteen thousand, four hundred eighty-seven".