87551129 has 2 divisors, whose sum is σ = 87551130. Its totient is φ = 87551128.

The previous prime is 87551117. The next prime is 87551171. The reversal of 87551129 is 92115578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86062729 + 1488400 = 9277^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 87551129 - 2⁸ = 87550873 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87551092 and 87551101.

It is not a weakly prime, because it can be changed into another prime (87551729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43775564 + 43775565.

It is an arithmetic number, because the mean of its divisors is an integer number (43775565).

Almost surely, 2^87551129 is an apocalyptic number.

It is an amenable number.

87551129 is a deficient number, since it is larger than the sum of its proper divisors (1).

87551129 is an equidigital number, since it uses as much as digits as its factorization.

87551129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 87551129 is about 9356.8760278204. The cubic root of 87551129 is about 444.0384557364.

The spelling of 87551129 in words is "eighty-seven million, five hundred fifty-one thousand, one hundred twenty-nine".