900021449 has 8 divisors (see below), whose sum is σ = 905280480. Its totient is φ = 894774816.

The previous prime is 900021427. The next prime is 900021491. The reversal of 900021449 is 944120009.

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

It is a cyclic number.

It is not a de Polignac number, because 900021449 - 2²⁸ = 631585993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900021649) 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, 169574 + ... + 174800.

It is an arithmetic number, because the mean of its divisors is an integer number (113160060).

Almost surely, 2^900021449 is an apocalyptic number.

It is an amenable number.

900021449 is a deficient number, since it is larger than the sum of its proper divisors (5259031).

900021449 is a wasteful number, since it uses less digits than its factorization.

900021449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 900021449 is about 30000.3574812035. The cubic root of 900021449 is about 965.4970544639.

The spelling of 900021449 in words is "nine hundred million, twenty-one thousand, four hundred forty-nine".