87511469 has 2 divisors, whose sum is σ = 87511470. Its totient is φ = 87511468.

The previous prime is 87511453. The next prime is 87511483. The reversal of 87511469 is 96411578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48135844 + 39375625 = 6938^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 87511469 - 2⁴ = 87511453 is a prime.

It is a super-2 number, since 2×87511469² = 15316514413075922, 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 (87511429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43755734 + 43755735.

It is an arithmetic number, because the mean of its divisors is an integer number (43755735).

Almost surely, 2^87511469 is an apocalyptic number.

It is an amenable number.

87511469 is a deficient number, since it is larger than the sum of its proper divisors (1).

87511469 is an equidigital number, since it uses as much as digits as its factorization.

87511469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 87511469 is about 9354.7564906843. The cubic root of 87511469 is about 443.9713969210.

The spelling of 87511469 in words is "eighty-seven million, five hundred eleven thousand, four hundred sixty-nine".