1053703921 has 4 divisors (see below), whose sum is σ = 1054153332. Its totient is φ = 1053254512.

The previous prime is 1053703913. The next prime is 1053703927. The reversal of 1053703921 is 1293073501.

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 137733696 + 915970225 = 11736^2 + 30265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053703921 - 2³ = 1053703913 is a prime.

It is a super-2 number, since 2×1053703921² = 2220583906261548482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1053703927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221170 + ... + 225883.

It is an arithmetic number, because the mean of its divisors is an integer number (263538333).

Almost surely, 2^1053703921 is an apocalyptic number.

It is an amenable number.

1053703921 is a deficient number, since it is larger than the sum of its proper divisors (449411).

1053703921 is an equidigital number, since it uses as much as digits as its factorization.

1053703921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449410.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 1053703921 is about 32460.8059203711. The cubic root of 1053703921 is about 1017.5900818330.

The spelling of 1053703921 in words is "one billion, fifty-three million, seven hundred three thousand, nine hundred twenty-one".