63988469 has 2 divisors, whose sum is σ = 63988470. Its totient is φ = 63988468.

The previous prime is 63988439. The next prime is 63988489. The reversal of 63988469 is 96488936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 11135569 = 7270^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 63988469 - 2¹² = 63984373 is a prime.

It is a super-2 number, since 2×63988469² = 8189048329927922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63988469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63988439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31994234 + 31994235.

It is an arithmetic number, because the mean of its divisors is an integer number (31994235).

Almost surely, 2^63988469 is an apocalyptic number.

It is an amenable number.

63988469 is a deficient number, since it is larger than the sum of its proper divisors (1).

63988469 is an equidigital number, since it uses as much as digits as its factorization.

63988469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The square root of 63988469 is about 7999.2792800352. The cubic root of 63988469 is about 399.9759756404.

The spelling of 63988469 in words is "sixty-three million, nine hundred eighty-eight thousand, four hundred sixty-nine".