1051989826 has 4 divisors (see below), whose sum is σ = 1577984742. Its totient is φ = 525994912.

The previous prime is 1051989821. The next prime is 1051989863. The reversal of 1051989826 is 6289891501.

1051989826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6289891501 = 8231 ⋅764171.

It can be written as a sum of positive squares in only one way, i.e., 1024960225 + 27029601 = 32015^2 + 5199^2 .

It is a super-2 number, since 2×1051989826² = 2213365188015020552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1051989826.

It is not an unprimeable number, because it can be changed into a prime (1051989821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262997455 + ... + 262997458.

Almost surely, 2^1051989826 is an apocalyptic number.

1051989826 is a deficient number, since it is larger than the sum of its proper divisors (525994916).

1051989826 is an equidigital number, since it uses as much as digits as its factorization.

1051989826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525994915.

The product of its (nonzero) digits is 311040, while the sum is 49.

The square root of 1051989826 is about 32434.3926411456. The cubic root of 1051989826 is about 1017.0379998867.

The spelling of 1051989826 in words is "one billion, fifty-one million, nine hundred eighty-nine thousand, eight hundred twenty-six".