381689511 has 8 divisors (see below), whose sum is σ = 581622144. Its totient is φ = 218108280.

The previous prime is 381689509. The next prime is 381689519. The reversal of 381689511 is 115986183.

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

It is not a de Polignac number, because 381689511 - 2¹ = 381689509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381689519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9087825 + ... + 9087866.

It is an arithmetic number, because the mean of its divisors is an integer number (72702768).

Almost surely, 2^381689511 is an apocalyptic number.

381689511 is a deficient number, since it is larger than the sum of its proper divisors (199932633).

381689511 is a wasteful number, since it uses less digits than its factorization.

381689511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18175701.

The product of its digits is 51840, while the sum is 42.

The square root of 381689511 is about 19536.8756714066. The cubic root of 381689511 is about 725.3875128531.

The spelling of 381689511 in words is "three hundred eighty-one million, six hundred eighty-nine thousand, five hundred eleven".