8169381 has 24 divisors (see below), whose sum is σ = 12972960. Its totient is φ = 4912800.

The previous prime is 8169379. The next prime is 8169383. The reversal of 8169381 is 1839618.

It is an interprime number because it is at equal distance from previous prime (8169379) and next prime (8169383).

It is not a de Polignac number, because 8169381 - 2¹ = 8169379 is a prime.

It is a super-2 number, since 2×8169381² = 133477571846322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8169383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17491 + ... + 17951.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^8169381 is an apocalyptic number.

It is an amenable number.

8169381 is a deficient number, since it is larger than the sum of its proper divisors (4803579).

8169381 is a wasteful number, since it uses less digits than its factorization.

8169381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 654 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8169381 is about 2858.2129031967. The cubic root of 8169381 is about 201.4016621019.

The spelling of 8169381 in words is "eight million, one hundred sixty-nine thousand, three hundred eighty-one".