8378133 has 4 divisors (see below), whose sum is σ = 11170848. Its totient is φ = 5585420.

The previous prime is 8378131. The next prime is 8378147. The reversal of 8378133 is 3318738.

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 8378133 - 2¹ = 8378131 is a prime.

It is a super-2 number, since 2×8378133² = 140386225131378, which contains 22 as substring.

8378133 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8378094 and 8378103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8378131) 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, 1396353 + ... + 1396358.

It is an arithmetic number, because the mean of its divisors is an integer number (2792712).

Almost surely, 2^8378133 is an apocalyptic number.

It is an amenable number.

8378133 is a deficient number, since it is larger than the sum of its proper divisors (2792715).

8378133 is a wasteful number, since it uses less digits than its factorization.

8378133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792714.

The product of its digits is 12096, while the sum is 33.

The square root of 8378133 is about 2894.5004750388. The cubic root of 8378133 is about 203.1027249104.

The spelling of 8378133 in words is "eight million, three hundred seventy-eight thousand, one hundred thirty-three".