87434218 has 4 divisors (see below), whose sum is σ = 131151330. Its totient is φ = 43717108.

The previous prime is 87434209. The next prime is 87434231. The reversal of 87434218 is 81243478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81243478 = 2 ⋅40621739.

It can be written as a sum of positive squares in only one way, i.e., 77492809 + 9941409 = 8803^2 + 3153^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21858553 + ... + 21858556.

Almost surely, 2^87434218 is an apocalyptic number.

87434218 is a deficient number, since it is larger than the sum of its proper divisors (43717112).

87434218 is a wasteful number, since it uses less digits than its factorization.

87434218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43717111.

The product of its digits is 43008, while the sum is 37.

The square root of 87434218 is about 9350.6266100192. The cubic root of 87434218 is about 443.8407194539.

The spelling of 87434218 in words is "eighty-seven million, four hundred thirty-four thousand, two hundred eighteen".