1631039 has 4 divisors (see below), whose sum is σ = 1653456. Its totient is φ = 1608624.

The previous prime is 1631029. The next prime is 1631051. The reversal of 1631039 is 9301361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1631039 - 2⁴ = 1631023 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11099 + ... + 11244.

It is an arithmetic number, because the mean of its divisors is an integer number (413364).

2^1631039 is an apocalyptic number.

1631039 is a deficient number, since it is larger than the sum of its proper divisors (22417).

1631039 is an equidigital number, since it uses as much as digits as its factorization.

1631039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22416.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1631039 is about 1277.1213724623. The cubic root of 1631039 is about 117.7121923988.

The spelling of 1631039 in words is "one million, six hundred thirty-one thousand, thirty-nine".