87049217 has 4 divisors (see below), whose sum is σ = 88901376. Its totient is φ = 85197060.

The previous prime is 87049199. The next prime is 87049223. The reversal of 87049217 is 71294078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71294078 = 2 ⋅35647039.

It is a cyclic number.

It is not a de Polignac number, because 87049217 - 2¹² = 87045121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87049117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926009 + ... + 926102.

It is an arithmetic number, because the mean of its divisors is an integer number (22225344).

Almost surely, 2^87049217 is an apocalyptic number.

It is an amenable number.

87049217 is a deficient number, since it is larger than the sum of its proper divisors (1852159).

87049217 is a wasteful number, since it uses less digits than its factorization.

87049217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852158.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 87049217 is about 9330.0169881946. The cubic root of 87049217 is about 443.1883030734.

The spelling of 87049217 in words is "eighty-seven million, forty-nine thousand, two hundred seventeen".