1029557849 has 4 divisors (see below), whose sum is σ = 1036964880. Its totient is φ = 1022150820.

The previous prime is 1029557843. The next prime is 1029557857. The reversal of 1029557849 is 9487559201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9487559201 = 3739 ⋅2537459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1029557849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1029557797 and 1029557806.

It is not an unprimeable number, because it can be changed into a prime (1029557843) 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, 3703307 + ... + 3703584.

It is an arithmetic number, because the mean of its divisors is an integer number (259241220).

Almost surely, 2^1029557849 is an apocalyptic number.

It is an amenable number.

1029557849 is a deficient number, since it is larger than the sum of its proper divisors (7407031).

1029557849 is an equidigital number, since it uses as much as digits as its factorization.

1029557849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407030.

The product of its (nonzero) digits is 907200, while the sum is 50.

The square root of 1029557849 is about 32086.7238745248. The cubic root of 1029557849 is about 1009.7571055947.

The spelling of 1029557849 in words is "one billion, twenty-nine million, five hundred fifty-seven thousand, eight hundred forty-nine".