7381813 has 8 divisors (see below), whose sum is σ = 7660800. Its totient is φ = 7105440.

The previous prime is 7381789. The next prime is 7381819. The reversal of 7381813 is 3181837.

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

It is a cyclic number.

It is not a de Polignac number, because 7381813 - 2⁹ = 7381301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7381819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6513 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^7381813 is an apocalyptic number.

It is an amenable number.

7381813 is a deficient number, since it is larger than the sum of its proper divisors (278987).

7381813 is a wasteful number, since it uses less digits than its factorization.

7381813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its digits is 4032, while the sum is 31.

The square root of 7381813 is about 2716.9492082113. The cubic root of 7381813 is about 194.7097412942.

The spelling of 7381813 in words is "seven million, three hundred eighty-one thousand, eight hundred thirteen".