5635921 has 2 divisors, whose sum is σ = 5635922. Its totient is φ = 5635920.

The previous prime is 5635873. The next prime is 5635957. The reversal of 5635921 is 1295365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3370896 + 2265025 = 1836^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 5635921 - 2¹³ = 5627729 is a prime.

It is a Chen prime.

5635921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5635961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2817960 + 2817961.

It is an arithmetic number, because the mean of its divisors is an integer number (2817961).

Almost surely, 2^5635921 is an apocalyptic number.

It is an amenable number.

5635921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5635921 is an equidigital number, since it uses as much as digits as its factorization.

5635921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 5635921 is about 2374.0094776559. The cubic root of 5635921 is about 177.9596866160.

It can be divided in two parts, 5635 and 921, that added together give a palindrome (6556).

The spelling of 5635921 in words is "five million, six hundred thirty-five thousand, nine hundred twenty-one".