87609557 has 4 divisors (see below), whose sum is σ = 100125216. Its totient is φ = 75093900.

The previous prime is 87609547. The next prime is 87609559. The reversal of 87609557 is 75590678.

It is a happy number.

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: 75590678 = 2 ⋅37795339.

It is not a de Polignac number, because 87609557 - 2⁴ = 87609541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87609559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6257819 + ... + 6257832.

It is an arithmetic number, because the mean of its divisors is an integer number (25031304).

Almost surely, 2^87609557 is an apocalyptic number.

It is an amenable number.

87609557 is a deficient number, since it is larger than the sum of its proper divisors (12515659).

87609557 is a wasteful number, since it uses less digits than its factorization.

87609557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12515658.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 87609557 is about 9359.9977029912. The cubic root of 87609557 is about 444.1372114004.

The spelling of 87609557 in words is "eighty-seven million, six hundred nine thousand, five hundred fifty-seven".