87049509 has 4 divisors (see below), whose sum is σ = 116066016. Its totient is φ = 58033004.

The previous prime is 87049489. The next prime is 87049511. The reversal of 87049509 is 90594078.

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.

It is a cyclic number.

It is not a de Polignac number, because 87049509 - 2⁵ = 87049477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87049559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14508249 + ... + 14508254.

It is an arithmetic number, because the mean of its divisors is an integer number (29016504).

Almost surely, 2^87049509 is an apocalyptic number.

It is an amenable number.

87049509 is a deficient number, since it is larger than the sum of its proper divisors (29016507).

87049509 is a wasteful number, since it uses less digits than its factorization.

87049509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29016506.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 87049509 is about 9330.0326365989. The cubic root of 87049509 is about 443.1887986201.

The spelling of 87049509 in words is "eighty-seven million, forty-nine thousand, five hundred nine".