87551389 has 8 divisors (see below), whose sum is σ = 89359200. Its totient is φ = 85749456.

The previous prime is 87551371. The next prime is 87551407. The reversal of 87551389 is 98315578.

It is an interprime number because it is at equal distance from previous prime (87551371) and next prime (87551407).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87551389 - 2⁹ = 87550877 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 (87551689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40662 + ... + 42760.

It is an arithmetic number, because the mean of its divisors is an integer number (11169900).

Almost surely, 2^87551389 is an apocalyptic number.

It is an amenable number.

87551389 is a deficient number, since it is larger than the sum of its proper divisors (1807811).

87551389 is a wasteful number, since it uses less digits than its factorization.

87551389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939.

The product of its digits is 302400, while the sum is 46.

The square root of 87551389 is about 9356.8899213360. The cubic root of 87551389 is about 444.0388952886.

The spelling of 87551389 in words is "eighty-seven million, five hundred fifty-one thousand, three hundred eighty-nine".