76959409 has 2 divisors, whose sum is σ = 76959410. Its totient is φ = 76959408.

The previous prime is 76959401. The next prime is 76959413. The reversal of 76959409 is 90495967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 5049009 = 8480^2 + 2247^2 .

It is a cyclic number.

It is not a de Polignac number, because 76959409 - 2³ = 76959401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76959401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38479704 + 38479705.

It is an arithmetic number, because the mean of its divisors is an integer number (38479705).

Almost surely, 2^76959409 is an apocalyptic number.

It is an amenable number.

76959409 is a deficient number, since it is larger than the sum of its proper divisors (1).

76959409 is an equidigital number, since it uses as much as digits as its factorization.

76959409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 76959409 is about 8772.6511956193. The cubic root of 76959409 is about 425.3573170347.

The spelling of 76959409 in words is "seventy-six million, nine hundred fifty-nine thousand, four hundred nine".