381617 has 4 divisors (see below), whose sum is σ = 383040. Its totient is φ = 380196.

The previous prime is 381607. The next prime is 381629. The reversal of 381617 is 716183.

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 381617 - 2¹² = 377521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381607) 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, 173 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2³⁸¹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

381617 is a deficient number, since it is larger than the sum of its proper divisors (1423).

381617 is a wasteful number, since it uses less digits than its factorization.

381617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its digits is 1008, while the sum is 26.

The square root of 381617 is about 617.7515681890. The cubic root of 381617 is about 72.5341575074.

The spelling of 381617 in words is "three hundred eighty-one thousand, six hundred seventeen".