1028913 has 4 divisors (see below), whose sum is σ = 1371888. Its totient is φ = 685940.

The previous prime is 1028903. The next prime is 1028939. The reversal of 1028913 is 3198201.

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: 3198201 = 3 ⋅1066067.

It is a cyclic number.

It is not a de Polignac number, because 1028913 - 2¹⁸ = 766769 is a prime.

It is an Ulam number.

It is a D-number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1028903) 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, 171483 + ... + 171488.

It is an arithmetic number, because the mean of its divisors is an integer number (342972).

2^1028913 is an apocalyptic number.

It is an amenable number.

1028913 is a deficient number, since it is larger than the sum of its proper divisors (342975).

1028913 is an equidigital number, since it uses as much as digits as its factorization.

1028913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342974.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1028913 is about 1014.3534886813. The cubic root of 1028913 is about 100.9546245871.

The spelling of 1028913 in words is "one million, twenty-eight thousand, nine hundred thirteen".