87429889 has 4 divisors (see below), whose sum is σ = 90250240. Its totient is φ = 84609540.

The previous prime is 87429871. The next prime is 87429893. The reversal of 87429889 is 98892478.

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 not a de Polignac number, because 87429889 - 2⁵ = 87429857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87429829) 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, 1410129 + ... + 1410190.

It is an arithmetic number, because the mean of its divisors is an integer number (22562560).

Almost surely, 2^87429889 is an apocalyptic number.

It is an amenable number.

87429889 is a deficient number, since it is larger than the sum of its proper divisors (2820351).

87429889 is a wasteful number, since it uses less digits than its factorization.

87429889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820350.

The product of its digits is 2322432, while the sum is 55.

The square root of 87429889 is about 9350.3951253410. The cubic root of 87429889 is about 443.8333942586.

The spelling of 87429889 in words is "eighty-seven million, four hundred twenty-nine thousand, eight hundred eighty-nine".