87199061 has 2 divisors, whose sum is σ = 87199062. Its totient is φ = 87199060.

The previous prime is 87199051. The next prime is 87199067. The reversal of 87199061 is 16099178.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47748100 + 39450961 = 6910^2 + 6281^2 .

It is a cyclic number.

It is not a de Polignac number, because 87199061 - 2⁶ = 87198997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87199067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43599530 + 43599531.

It is an arithmetic number, because the mean of its divisors is an integer number (43599531).

Almost surely, 2^87199061 is an apocalyptic number.

It is an amenable number.

87199061 is a deficient number, since it is larger than the sum of its proper divisors (1).

87199061 is an equidigital number, since it uses as much as digits as its factorization.

87199061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 87199061 is about 9338.0437458817. The cubic root of 87199061 is about 443.4424544676.

The spelling of 87199061 in words is "eighty-seven million, one hundred ninety-nine thousand, sixty-one".