87298032105 has 12 divisors (see below), whose sum is σ = 151316589060. Its totient is φ = 46558950432.

The previous prime is 87298032083. The next prime is 87298032109. The reversal of 87298032105 is 50123089278.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18786540096 + 68511492009 = 137064^2 + 261747^2 .

It is not a de Polignac number, because 87298032105 - 2¹² = 87298028009 is a prime.

It is a super-2 number, since 2×87298032105² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1939956269 = 87298032105 / (8 + 7 + 2 + 9 + 8 + 0 + 3 + 2 + 1 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (87298032109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 969978090 + ... + 969978179.

It is an arithmetic number, because the mean of its divisors is an integer number (12609715755).

Almost surely, 2^87298032105 is an apocalyptic number.

It is an amenable number.

87298032105 is a deficient number, since it is larger than the sum of its proper divisors (64018556955).

87298032105 is a wasteful number, since it uses less digits than its factorization.

87298032105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939956280 (or 1939956277 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 87298032105 in words is "eighty-seven billion, two hundred ninety-eight million, thirty-two thousand, one hundred five".