7381831 has 2 divisors, whose sum is σ = 7381832. Its totient is φ = 7381830.

The previous prime is 7381819. The next prime is 7381837. The reversal of 7381831 is 1381837.

7381831 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1381837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7381831 - 2¹⁷ = 7250759 is a prime.

It is a super-2 number, since 2×7381831² = 108982857825122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7381793 and 7381802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7381837) 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 as a sum of consecutive naturals, namely, 3690915 + 3690916.

It is an arithmetic number, because the mean of its divisors is an integer number (3690916).

Almost surely, 2^7381831 is an apocalyptic number.

7381831 is a deficient number, since it is larger than the sum of its proper divisors (1).

7381831 is an equidigital number, since it uses as much as digits as its factorization.

7381831 is an odious number, because the sum of its binary digits is odd.

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

The square root of 7381831 is about 2716.9525207482. The cubic root of 7381831 is about 194.7098995558.

The spelling of 7381831 in words is "seven million, three hundred eighty-one thousand, eight hundred thirty-one".