87511049 has 4 divisors (see below), whose sum is σ = 87834240. Its totient is φ = 87187860.

The previous prime is 87511033. The next prime is 87511057. The reversal of 87511049 is 94011578.

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: 94011578 = 2 ⋅47005789.

It is a cyclic number.

It is not a de Polignac number, because 87511049 - 2⁴ = 87511033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87511069) 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 3 ways as a sum of consecutive naturals, for example, 161189 + ... + 161730.

It is an arithmetic number, because the mean of its divisors is an integer number (21958560).

Almost surely, 2^87511049 is an apocalyptic number.

It is an amenable number.

87511049 is a deficient number, since it is larger than the sum of its proper divisors (323191).

87511049 is a wasteful number, since it uses less digits than its factorization.

87511049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323190.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 87511049 is about 9354.7340421842. The cubic root of 87511049 is about 443.9706866587.

The spelling of 87511049 in words is "eighty-seven million, five hundred eleven thousand, forty-nine".