609768739 has 2 divisors, whose sum is σ = 609768740. Its totient is φ = 609768738.

The previous prime is 609768697. The next prime is 609768787. The reversal of 609768739 is 937867906.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 609768739 - 2⁷ = 609768611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 609768739.

It is not a weakly prime, because it can be changed into another prime (609748739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304884369 + 304884370.

It is an arithmetic number, because the mean of its divisors is an integer number (304884370).

Almost surely, 2^609768739 is an apocalyptic number.

609768739 is a deficient number, since it is larger than the sum of its proper divisors (1).

609768739 is an equidigital number, since it uses as much as digits as its factorization.

609768739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The square root of 609768739 is about 24693.4958845442. The cubic root of 609768739 is about 847.9854200316.

The spelling of 609768739 in words is "six hundred nine million, seven hundred sixty-eight thousand, seven hundred thirty-nine".