87647269 has 2 divisors, whose sum is σ = 87647270. Its totient is φ = 87647268.

The previous prime is 87647249. The next prime is 87647279. The reversal of 87647269 is 96274678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87647044 + 225 = 9362^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 87647269 - 2²¹ = 85550117 is a prime.

It is a super-2 number, since 2×87647269² = 15364087526316722, 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 (87647249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43823634 + 43823635.

It is an arithmetic number, because the mean of its divisors is an integer number (43823635).

Almost surely, 2^87647269 is an apocalyptic number.

It is an amenable number.

87647269 is a deficient number, since it is larger than the sum of its proper divisors (1).

87647269 is an equidigital number, since it uses as much as digits as its factorization.

87647269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 87647269 is about 9362.0120166554. The cubic root of 87647269 is about 444.2009293340.

The spelling of 87647269 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred sixty-nine".