5638769 has 2 divisors, whose sum is σ = 5638770. Its totient is φ = 5638768.

The previous prime is 5638757. The next prime is 5638777. The reversal of 5638769 is 9678365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5569600 + 69169 = 2360^2 + 263^2 .

It is a cyclic number.

It is not a de Polignac number, because 5638769 - 2⁴ = 5638753 is a prime.

It is a super-2 number, since 2×5638769² = 63591431670722, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (5638709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2819384 + 2819385.

It is an arithmetic number, because the mean of its divisors is an integer number (2819385).

Almost surely, 2^5638769 is an apocalyptic number.

It is an amenable number.

5638769 is a deficient number, since it is larger than the sum of its proper divisors (1).

5638769 is an equidigital number, since it uses as much as digits as its factorization.

5638769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 5638769 is about 2374.6092310104. The cubic root of 5638769 is about 177.9896576914.

The spelling of 5638769 in words is "five million, six hundred thirty-eight thousand, seven hundred sixty-nine".