87875561 has 2 divisors, whose sum is σ = 87875562. Its totient is φ = 87875560.

The previous prime is 87875549. The next prime is 87875573. The reversal of 87875561 is 16557878.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (87875549) and next prime (87875573).

It can be written as a sum of positive squares in only one way, i.e., 77352025 + 10523536 = 8795^2 + 3244^2 .

It is a cyclic number.

It is not a de Polignac number, because 87875561 - 2⁶ = 87875497 is a prime.

It is a super-2 number, since 2×87875561² = 15444228442129442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87875591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43937780 + 43937781.

It is an arithmetic number, because the mean of its divisors is an integer number (43937781).

Almost surely, 2^87875561 is an apocalyptic number.

It is an amenable number.

87875561 is a deficient number, since it is larger than the sum of its proper divisors (1).

87875561 is an equidigital number, since it uses as much as digits as its factorization.

87875561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 47.

The square root of 87875561 is about 9374.1965522385. The cubic root of 87875561 is about 444.5862602276.

The spelling of 87875561 in words is "eighty-seven million, eight hundred seventy-five thousand, five hundred sixty-one".