11428993 has 2 divisors, whose sum is σ = 11428994. Its totient is φ = 11428992.

The previous prime is 11428969. The next prime is 11429023. The reversal of 11428993 is 39982411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5726449 + 5702544 = 2393^2 + 2388^2 .

It is a cyclic number.

It is not a de Polignac number, because 11428993 - 2⁵ = 11428961 is a prime.

It is not a weakly prime, because it can be changed into another prime (11428903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714496 + 5714497.

It is an arithmetic number, because the mean of its divisors is an integer number (5714497).

Almost surely, 2^11428993 is an apocalyptic number.

It is an amenable number.

11428993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428993 is an equidigital number, since it uses as much as digits as its factorization.

11428993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 11428993 is about 3380.6793695942. The cubic root of 11428993 is about 225.2523456859.

It can be divided in two parts, 11428 and 993, that added together give a palindrome (12421).

The spelling of 11428993 in words is "eleven million, four hundred twenty-eight thousand, nine hundred ninety-three".