9054869821 has 4 divisors (see below), whose sum is σ = 9055235644. Its totient is φ = 9054504000.

The previous prime is 9054869801. The next prime is 9054869827. The reversal of 9054869821 is 1289684509.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3476871225 + 5577998596 = 58965^2 + 74686^2 .

It is a cyclic number.

It is not a de Polignac number, because 9054869821 - 2⁷ = 9054869693 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 (9054869827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142860 + ... + 196261.

It is an arithmetic number, because the mean of its divisors is an integer number (2263808911).

Almost surely, 2^9054869821 is an apocalyptic number.

It is an amenable number.

9054869821 is a deficient number, since it is larger than the sum of its proper divisors (365823).

9054869821 is a wasteful number, since it uses less digits than its factorization.

9054869821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365822.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The square root of 9054869821 is about 95157.0797208489. The cubic root of 9054869821 is about 2084.3024402710.

The spelling of 9054869821 in words is "nine billion, fifty-four million, eight hundred sixty-nine thousand, eight hundred twenty-one".