1052203991 has 4 divisors (see below), whose sum is σ = 1056115800. Its totient is φ = 1048292184.

The previous prime is 1052203981. The next prime is 1052204011. The reversal of 1052203991 is 1993022501.

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

It is a cyclic number.

It is not a de Polignac number, because 1052203991 - 2⁶ = 1052203927 is a prime.

It is a super-2 number, since 2×1052203991² = 2214266477352656162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052203981) 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, 1955501 + ... + 1956038.

It is an arithmetic number, because the mean of its divisors is an integer number (264028950).

Almost surely, 2^1052203991 is an apocalyptic number.

1052203991 is a deficient number, since it is larger than the sum of its proper divisors (3911809).

1052203991 is an equidigital number, since it uses as much as digits as its factorization.

1052203991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911808.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1052203991 is about 32437.6939840057. The cubic root of 1052203991 is about 1017.1070116960.

The spelling of 1052203991 in words is "one billion, fifty-two million, two hundred three thousand, nine hundred ninety-one".