128610739 has 2 divisors, whose sum is σ = 128610740. Its totient is φ = 128610738.

The previous prime is 128610731. The next prime is 128610803. The reversal of 128610739 is 937016821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128610739 - 2³ = 128610731 is a prime.

It is a super-2 number, since 2×128610739² = 33081444372252242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128610698 and 128610707.

It is not a weakly prime, because it can be changed into another prime (128610731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64305369 + 64305370.

It is an arithmetic number, because the mean of its divisors is an integer number (64305370).

Almost surely, 2^128610739 is an apocalyptic number.

128610739 is a deficient number, since it is larger than the sum of its proper divisors (1).

128610739 is an equidigital number, since it uses as much as digits as its factorization.

128610739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 128610739 is about 11340.6674847647. The cubic root of 128610739 is about 504.7686932073.

The spelling of 128610739 in words is "one hundred twenty-eight million, six hundred ten thousand, seven hundred thirty-nine".