1423637 has 2 divisors, whose sum is σ = 1423638. Its totient is φ = 1423636.

The previous prime is 1423627. The next prime is 1423663. The reversal of 1423637 is 7363241.

It is an a-pointer prime, because the next prime (1423663) can be obtained adding 1423637 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 148996 = 1129^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423637 - 2⁸ = 1423381 is a prime.

It is an Ulam number.

It is equal to p₁₀₈₇₄₆ and since 1423637 and 108746 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711818 + 711819.

It is an arithmetic number, because the mean of its divisors is an integer number (711819).

2^1423637 is an apocalyptic number.

It is an amenable number.

1423637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423637 is an equidigital number, since it uses as much as digits as its factorization.

1423637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 26.

The square root of 1423637 is about 1193.1626041743. The cubic root of 1423637 is about 112.4949660299.

Adding to 1423637 its reverse (7363241), we get a palindrome (8786878).

The spelling of 1423637 in words is "one million, four hundred twenty-three thousand, six hundred thirty-seven".