87988469 has 2 divisors, whose sum is σ = 87988470. Its totient is φ = 87988468.

The previous prime is 87988463. The next prime is 87988493. The reversal of 87988469 is 96488978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67404100 + 20584369 = 8210^2 + 4537^2 .

It is a cyclic number.

It is not a de Polignac number, because 87988469 - 2⁸ = 87988213 is a prime.

It is a super-2 number, since 2×87988469² = 15483941353927922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87988463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43994234 + 43994235.

It is an arithmetic number, because the mean of its divisors is an integer number (43994235).

Almost surely, 2^87988469 is an apocalyptic number.

It is an amenable number.

87988469 is a deficient number, since it is larger than the sum of its proper divisors (1).

87988469 is an equidigital number, since it uses as much as digits as its factorization.

87988469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 59.

The square root of 87988469 is about 9380.2168951469. The cubic root of 87988469 is about 444.7765894513.

The spelling of 87988469 in words is "eighty-seven million, nine hundred eighty-eight thousand, four hundred sixty-nine".