87667469 has 2 divisors, whose sum is σ = 87667470. Its totient is φ = 87667468.

The previous prime is 87667417. The next prime is 87667477. The reversal of 87667469 is 96476678.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87198244 + 469225 = 9338^2 + 685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87667469 is a prime.

It is a super-2 number, since 2×87667469² = 15371170241731922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87667469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87667409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43833734 + 43833735.

It is an arithmetic number, because the mean of its divisors is an integer number (43833735).

Almost surely, 2^87667469 is an apocalyptic number.

It is an amenable number.

87667469 is a deficient number, since it is larger than the sum of its proper divisors (1).

87667469 is an equidigital number, since it uses as much as digits as its factorization.

87667469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 87667469 is about 9363.0907824286. The cubic root of 87667469 is about 444.2350515972.

The spelling of 87667469 in words is "eighty-seven million, six hundred sixty-seven thousand, four hundred sixty-nine".