8357381 has 4 divisors (see below), whose sum is σ = 8364000. Its totient is φ = 8350764.

The previous prime is 8357347. The next prime is 8357389. The reversal of 8357381 is 1837538.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8357381 - 2¹⁸ = 8095237 is a prime.

It is a super-2 number, since 2×8357381² = 139691634358322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8357389) 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, 761 + ... + 4158.

It is an arithmetic number, because the mean of its divisors is an integer number (2091000).

Almost surely, 2^8357381 is an apocalyptic number.

It is an amenable number.

8357381 is a deficient number, since it is larger than the sum of its proper divisors (6619).

8357381 is a wasteful number, since it uses less digits than its factorization.

8357381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6618.

The product of its digits is 20160, while the sum is 35.

The square root of 8357381 is about 2890.9135234386. The cubic root of 8357381 is about 202.9348962527.

The spelling of 8357381 in words is "eight million, three hundred fifty-seven thousand, three hundred eighty-one".