128604739 has 2 divisors, whose sum is σ = 128604740. Its totient is φ = 128604738.

The previous prime is 128604727. The next prime is 128604743. The reversal of 128604739 is 937406821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128604739 is a prime.

It is a super-5 number, since 5×128604739⁵ (a number of 42 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (128605739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64302369 + 64302370.

It is an arithmetic number, because the mean of its divisors is an integer number (64302370).

Almost surely, 2^128604739 is an apocalyptic number.

128604739 is a deficient number, since it is larger than the sum of its proper divisors (1).

128604739 is an equidigital number, since it uses as much as digits as its factorization.

128604739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 128604739 is about 11340.4029469856. The cubic root of 128604739 is about 504.7608435278.

The spelling of 128604739 in words is "one hundred twenty-eight million, six hundred four thousand, seven hundred thirty-nine".