7831361 has 4 divisors (see below), whose sum is σ = 7872132. Its totient is φ = 7790592.

The previous prime is 7831357. The next prime is 7831379. The reversal of 7831361 is 1631387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1631387 = 157 ⋅10391.

It can be written as a sum of positive squares in 2 ways, for example, as 3400336 + 4431025 = 1844^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 7831361 - 2² = 7831357 is a prime.

It is a super-2 number, since 2×7831361² = 122660430224642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7831301) 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, 20096 + ... + 20481.

It is an arithmetic number, because the mean of its divisors is an integer number (1968033).

Almost surely, 2^7831361 is an apocalyptic number.

It is an amenable number.

7831361 is a deficient number, since it is larger than the sum of its proper divisors (40771).

7831361 is a wasteful number, since it uses less digits than its factorization.

7831361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40770.

The product of its digits is 3024, while the sum is 29.

The square root of 7831361 is about 2798.4568962198. The cubic root of 7831361 is about 198.5846830146.

It can be divided in two parts, 7831 and 361, that added together give a 13-th power (8192 = 2¹³).

The spelling of 7831361 in words is "seven million, eight hundred thirty-one thousand, three hundred sixty-one".