675640739 has 2 divisors, whose sum is σ = 675640740. Its totient is φ = 675640738.

The previous prime is 675640733. The next prime is 675640783. The reversal of 675640739 is 937046576.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 675640739 - 2¹⁶ = 675575203 is a prime.

It is a super-2 number, since 2×675640739² = 912980816392932242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 675640693 and 675640702.

It is not a weakly prime, because it can be changed into another prime (675640733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337820369 + 337820370.

It is an arithmetic number, because the mean of its divisors is an integer number (337820370).

Almost surely, 2^675640739 is an apocalyptic number.

675640739 is a deficient number, since it is larger than the sum of its proper divisors (1).

675640739 is an equidigital number, since it uses as much as digits as its factorization.

675640739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 47.

The square root of 675640739 is about 25993.0902164402. The cubic root of 675640739 is about 877.4827940122.

The spelling of 675640739 in words is "six hundred seventy-five million, six hundred forty thousand, seven hundred thirty-nine".