128023733 has 2 divisors, whose sum is σ = 128023734. Its totient is φ = 128023732.

The previous prime is 128023697. The next prime is 128023759. The reversal of 128023733 is 337320821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114532804 + 13490929 = 10702^2 + 3673^2 .

It is an emirp because it is prime and its reverse (337320821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128023733 - 2⁸ = 128023477 is a prime.

It is a super-2 number, since 2×128023733² = 32780152422510578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128023696 and 128023705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128023783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64011866 + 64011867.

It is an arithmetic number, because the mean of its divisors is an integer number (64011867).

Almost surely, 2^128023733 is an apocalyptic number.

It is an amenable number.

128023733 is a deficient number, since it is larger than the sum of its proper divisors (1).

128023733 is an equidigital number, since it uses as much as digits as its factorization.

128023733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 128023733 is about 11314.7573106983. The cubic root of 128023733 is about 503.9995656438. Note that the first 3 decimals are identical.

The spelling of 128023733 in words is "one hundred twenty-eight million, twenty-three thousand, seven hundred thirty-three".