87421898 has 16 divisors (see below), whose sum is σ = 135267840. Its totient is φ = 42343056.

The previous prime is 87421897. The next prime is 87421909. The reversal of 87421898 is 89812478.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87421897) 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, 15215 + ... + 20157.

It is an arithmetic number, because the mean of its divisors is an integer number (8454240).

Almost surely, 2^87421898 is an apocalyptic number.

87421898 is a deficient number, since it is larger than the sum of its proper divisors (47845942).

87421898 is a wasteful number, since it uses less digits than its factorization.

87421898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221.

The product of its digits is 258048, while the sum is 47.

The square root of 87421898 is about 9349.9678074312. The cubic root of 87421898 is about 443.8198718779.

The spelling of 87421898 in words is "eighty-seven million, four hundred twenty-one thousand, eight hundred ninety-eight".