1028973947 has 4 divisors (see below), whose sum is σ = 1035788496. Its totient is φ = 1022159400.

The previous prime is 1028973941. The next prime is 1028973989. The reversal of 1028973947 is 7493798201.

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 1028973947 - 2²² = 1024779643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1028973895 and 1028973904.

It is not an unprimeable number, because it can be changed into a prime (1028973941) 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, 3407048 + ... + 3407349.

It is an arithmetic number, because the mean of its divisors is an integer number (258947124).

Almost surely, 2^1028973947 is an apocalyptic number.

1028973947 is a deficient number, since it is larger than the sum of its proper divisors (6814549).

1028973947 is an equidigital number, since it uses as much as digits as its factorization.

1028973947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814548.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 1028973947 is about 32077.6237742137. The cubic root of 1028973947 is about 1009.5661787514.

The spelling of 1028973947 in words is "one billion, twenty-eight million, nine hundred seventy-three thousand, nine hundred forty-seven".