898509021 has 8 divisors (see below), whose sum is σ = 1202276544. Its totient is φ = 596873760.

The previous prime is 898509019. The next prime is 898509083. The reversal of 898509021 is 120905898.

It is a happy number.

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

It is not a de Polignac number, because 898509021 - 2¹ = 898509019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898509091) 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, 532081 + ... + 533766.

It is an arithmetic number, because the mean of its divisors is an integer number (150284568).

Almost surely, 2^898509021 is an apocalyptic number.

It is an amenable number.

898509021 is a deficient number, since it is larger than the sum of its proper divisors (303767523).

898509021 is a wasteful number, since it uses less digits than its factorization.

898509021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066131.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 898509021 is about 29975.1400497145. The cubic root of 898509021 is about 964.9559327331.

The spelling of 898509021 in words is "eight hundred ninety-eight million, five hundred nine thousand, twenty-one".