1631327 has 4 divisors (see below), whose sum is σ = 1634136. Its totient is φ = 1628520.

The previous prime is 1631309. The next prime is 1631341. The reversal of 1631327 is 7231361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7231361 = 23 ⋅314407.

It is a cyclic number.

It is not a de Polignac number, because 1631327 - 2⁶ = 1631263 is a prime.

It is a super-2 number, since 2×1631327² = 5322455561858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631027) 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, 173 + ... + 1814.

It is an arithmetic number, because the mean of its divisors is an integer number (408534).

2^1631327 is an apocalyptic number.

1631327 is a deficient number, since it is larger than the sum of its proper divisors (2809).

1631327 is an equidigital number, since it uses as much as digits as its factorization.

1631327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808.

The product of its digits is 756, while the sum is 23.

The square root of 1631327 is about 1277.2341210600. The cubic root of 1631327 is about 117.7191203174.

Adding to 1631327 its reverse (7231361), we get a palindrome (8862688).

The spelling of 1631327 in words is "one million, six hundred thirty-one thousand, three hundred twenty-seven".