76638629 has 2 divisors, whose sum is σ = 76638630. Its totient is φ = 76638628.

The previous prime is 76638613. The next prime is 76638637. The reversal of 76638629 is 92683667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67650625 + 8988004 = 8225^2 + 2998^2 .

It is a cyclic number.

It is not a de Polignac number, because 76638629 - 2⁴ = 76638613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76638659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38319314 + 38319315.

It is an arithmetic number, because the mean of its divisors is an integer number (38319315).

Almost surely, 2^76638629 is an apocalyptic number.

It is an amenable number.

76638629 is a deficient number, since it is larger than the sum of its proper divisors (1).

76638629 is an equidigital number, since it uses as much as digits as its factorization.

76638629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 76638629 is about 8754.3491477094. The cubic root of 76638629 is about 424.7655066284.

The spelling of 76638629 in words is "seventy-six million, six hundred thirty-eight thousand, six hundred twenty-nine".