87299845 has 32 divisors (see below), whose sum is σ = 114501600. Its totient is φ = 63651840.

The previous prime is 87299843. The next prime is 87299867. The reversal of 87299845 is 54899278.

It can be written as a sum of positive squares in 16 ways, for example, as 73513476 + 13786369 = 8574^2 + 3713^2 .

It is not a de Polignac number, because 87299845 - 2¹ = 87299843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87299792 and 87299801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87299843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 585831 + ... + 585979.

It is an arithmetic number, because the mean of its divisors is an integer number (3578175).

Almost surely, 2^87299845 is an apocalyptic number.

87299845 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87299845 is a deficient number, since it is larger than the sum of its proper divisors (27201755).

87299845 is a wasteful number, since it uses less digits than its factorization.

87299845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345.

The product of its digits is 1451520, while the sum is 52.

The square root of 87299845 is about 9343.4386068513. The cubic root of 87299845 is about 443.6132311429.

The spelling of 87299845 in words is "eighty-seven million, two hundred ninety-nine thousand, eight hundred forty-five".