87289051 has 2 divisors, whose sum is σ = 87289052. Its totient is φ = 87289050.

The previous prime is 87289019. The next prime is 87289091. The reversal of 87289051 is 15098278.

It is an a-pointer prime, because the next prime (87289091) can be obtained adding 87289051 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87289051 - 2⁵ = 87289019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87288995 and 87289013.

It is not a weakly prime, because it can be changed into another prime (87289001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43644525 + 43644526.

It is an arithmetic number, because the mean of its divisors is an integer number (43644526).

Almost surely, 2^87289051 is an apocalyptic number.

87289051 is a deficient number, since it is larger than the sum of its proper divisors (1).

87289051 is an equidigital number, since it uses as much as digits as its factorization.

87289051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 87289051 is about 9342.8609643942. The cubic root of 87289051 is about 443.5949471907.

The spelling of 87289051 in words is "eighty-seven million, two hundred eighty-nine thousand, fifty-one".