76628609 has 2 divisors, whose sum is σ = 76628610. Its totient is φ = 76628608.

The previous prime is 76628597. The next prime is 76628633. The reversal of 76628609 is 90682667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42289009 + 34339600 = 6503^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 76628609 - 2⁴ = 76628593 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76628609.

It is not a weakly prime, because it can be changed into another prime (76628689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38314304 + 38314305.

It is an arithmetic number, because the mean of its divisors is an integer number (38314305).

Almost surely, 2^76628609 is an apocalyptic number.

It is an amenable number.

76628609 is a deficient number, since it is larger than the sum of its proper divisors (1).

76628609 is an equidigital number, since it uses as much as digits as its factorization.

76628609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 76628609 is about 8753.7768420265. The cubic root of 76628609 is about 424.7469940501.

The spelling of 76628609 in words is "seventy-six million, six hundred twenty-eight thousand, six hundred nine".