1028783897 has 4 divisors (see below), whose sum is σ = 1036185360. Its totient is φ = 1021382436.

The previous prime is 1028783891. The next prime is 1028783923. The reversal of 1028783897 is 7983878201.

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.

It is a cyclic number.

It is not a de Polignac number, because 1028783897 - 2⁴ = 1028783881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028783891) 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, 3700523 + ... + 3700800.

It is an arithmetic number, because the mean of its divisors is an integer number (259046340).

Almost surely, 2^1028783897 is an apocalyptic number.

It is an amenable number.

1028783897 is a deficient number, since it is larger than the sum of its proper divisors (7401463).

1028783897 is an equidigital number, since it uses as much as digits as its factorization.

1028783897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7401462.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 1028783897 is about 32074.6612920542. The cubic root of 1028783897 is about 1009.5040197866.

The spelling of 1028783897 in words is "one billion, twenty-eight million, seven hundred eighty-three thousand, eight hundred ninety-seven".