899590421 has 6 divisors (see below), whose sum is σ = 940404150. Its totient is φ = 860477288.

The previous prime is 899590379. The next prime is 899590429. The reversal of 899590421 is 124095998.

It can be written as a sum of positive squares in only one way, i.e., 548215396 + 351375025 = 23414^2 + 18745^2 .

It is not a de Polignac number, because 899590421 - 2¹⁴ = 899574037 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 (899590429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 849746 + ... + 850803.

It is an arithmetic number, because the mean of its divisors is an integer number (156734025).

Almost surely, 2^899590421 is an apocalyptic number.

It is an amenable number.

899590421 is a deficient number, since it is larger than the sum of its proper divisors (40813729).

899590421 is a wasteful number, since it uses less digits than its factorization.

899590421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700595 (or 1700572 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 899590421 is about 29993.1729065132. The cubic root of 899590421 is about 965.3429015763.

The spelling of 899590421 in words is "eight hundred ninety-nine million, five hundred ninety thousand, four hundred twenty-one".