77480929 has 2 divisors, whose sum is σ = 77480930. Its totient is φ = 77480928.

The previous prime is 77480911. The next prime is 77480987. The reversal of 77480929 is 92908477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77176225 + 304704 = 8785^2 + 552^2 .

It is a cyclic number.

It is not a de Polignac number, because 77480929 - 2⁷ = 77480801 is a prime.

It is not a weakly prime, because it can be changed into another prime (77480989) 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, 38740464 + 38740465.

It is an arithmetic number, because the mean of its divisors is an integer number (38740465).

Almost surely, 2^77480929 is an apocalyptic number.

It is an amenable number.

77480929 is a deficient number, since it is larger than the sum of its proper divisors (1).

77480929 is an equidigital number, since it uses as much as digits as its factorization.

77480929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 77480929 is about 8802.3252041719. The cubic root of 77480929 is about 426.3159745147.

The spelling of 77480929 in words is "seventy-seven million, four hundred eighty thousand, nine hundred twenty-nine".