76640929 has 2 divisors, whose sum is σ = 76640930. Its totient is φ = 76640928.

The previous prime is 76640909. The next prime is 76640933. The reversal of 76640929 is 92904667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72846225 + 3794704 = 8535^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 76640929 - 2¹³ = 76632737 is a prime.

It is not a weakly prime, because it can be changed into another prime (76640909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38320464 + 38320465.

It is an arithmetic number, because the mean of its divisors is an integer number (38320465).

Almost surely, 2^76640929 is an apocalyptic number.

It is an amenable number.

76640929 is a deficient number, since it is larger than the sum of its proper divisors (1).

76640929 is an equidigital number, since it uses as much as digits as its factorization.

76640929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 76640929 is about 8754.4805100017. The cubic root of 76640929 is about 424.7697557950.

The spelling of 76640929 in words is "seventy-six million, six hundred forty thousand, nine hundred twenty-nine".