7873531 has 2 divisors, whose sum is σ = 7873532. Its totient is φ = 7873530.

The previous prime is 7873513. The next prime is 7873553. The reversal of 7873531 is 1353787.

Together with previous prime (7873513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7873531 - 2¹¹ = 7871483 is a prime.

It is a super-2 number, since 2×7873531² = 123984980815922, which contains 22 as substring.

7873531 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7873511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936765 + 3936766.

It is an arithmetic number, because the mean of its divisors is an integer number (3936766).

Almost surely, 2^7873531 is an apocalyptic number.

7873531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7873531 is an equidigital number, since it uses as much as digits as its factorization.

7873531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 7873531 is about 2805.9812900303. The cubic root of 7873531 is about 198.9404887577.

The spelling of 7873531 in words is "seven million, eight hundred seventy-three thousand, five hundred thirty-one".