128322739 has 2 divisors, whose sum is σ = 128322740. Its totient is φ = 128322738.

The previous prime is 128322721. The next prime is 128322791. The reversal of 128322739 is 937223821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128322739 is a prime.

It is equal to p_7288273 and since 128322739 and 7288273 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 128322698 and 128322707.

It is not a weakly prime, because it can be changed into another prime (128322839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64161369 + 64161370.

It is an arithmetic number, because the mean of its divisors is an integer number (64161370).

Almost surely, 2^128322739 is an apocalyptic number.

128322739 is a deficient number, since it is larger than the sum of its proper divisors (1).

128322739 is an equidigital number, since it uses as much as digits as its factorization.

128322739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 128322739 is about 11327.9627029753. The cubic root of 128322739 is about 504.3916328564.

The spelling of 128322739 in words is "one hundred twenty-eight million, three hundred twenty-two thousand, seven hundred thirty-nine".