1631023 has 2 divisors, whose sum is σ = 1631024. Its totient is φ = 1631022.

The previous prime is 1630987. The next prime is 1631027. The reversal of 1631023 is 3201361.

It is a strong prime.

It is an emirp because it is prime and its reverse (3201361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1631023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1630988 and 1631006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815511 + 815512.

It is an arithmetic number, because the mean of its divisors is an integer number (815512).

2^1631023 is an apocalyptic number.

1631023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631023 is an equidigital number, since it uses as much as digits as its factorization.

1631023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1631023 is about 1277.1151083595. The cubic root of 1631023 is about 117.7118074905.

Adding to 1631023 its reverse (3201361), we get a palindrome (4832384).

The spelling of 1631023 in words is "one million, six hundred thirty-one thousand, twenty-three".