903899421 has 6 divisors (see below), whose sum is σ = 1305632510. Its totient is φ = 602599608.

The previous prime is 903899417. The next prime is 903899429. The reversal of 903899421 is 124998309.

903899421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 595896921 + 308002500 = 24411^2 + 17550^2 .

It is not a de Polignac number, because 903899421 - 2² = 903899417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (903899429) 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, 50216626 + ... + 50216643.

Almost surely, 2^903899421 is an apocalyptic number.

It is an amenable number.

903899421 is a deficient number, since it is larger than the sum of its proper divisors (401733089).

903899421 is a wasteful number, since it uses less digits than its factorization.

903899421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100433275 (or 100433272 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 903899421 is about 30064.9201063299. The cubic root of 903899421 is about 966.8817643549.

The spelling of 903899421 in words is "nine hundred three million, eight hundred ninety-nine thousand, four hundred twenty-one".