11428657309 has 2 divisors, whose sum is σ = 11428657310. Its totient is φ = 11428657308.

The previous prime is 11428657291. The next prime is 11428657321. The reversal of 11428657309 is 90375682411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7818450084 + 3610207225 = 88422^2 + 60085^2 .

It is a cyclic number.

It is not a de Polignac number, because 11428657309 - 2³¹ = 9281173661 is a prime.

It is a super-2 number, since 2×11428657309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11428657109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714328654 + 5714328655.

It is an arithmetic number, because the mean of its divisors is an integer number (5714328655).

It is a 1-persistent number, because it is pandigital, but 2⋅11428657309 = 22857314618 is not.

Almost surely, 2^11428657309 is an apocalyptic number.

It is an amenable number.

11428657309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428657309 is an equidigital number, since it uses as much as digits as its factorization.

11428657309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 11428657309 in words is "eleven billion, four hundred twenty-eight million, six hundred fifty-seven thousand, three hundred nine".