77490305 has 16 divisors (see below), whose sum is σ = 94962240. Its totient is φ = 60685632.

The previous prime is 77490277. The next prime is 77490307. The reversal of 77490305 is 50309477.

It is a cyclic number.

It is not a de Polignac number, because 77490305 - 2⁶ = 77490241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77490307) 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 in 15 ways as a sum of consecutive naturals, for example, 101987 + ... + 102743.

It is an arithmetic number, because the mean of its divisors is an integer number (5935140).

Almost surely, 2^77490305 is an apocalyptic number.

It is an amenable number.

77490305 is a deficient number, since it is larger than the sum of its proper divisors (17471935).

77490305 is a wasteful number, since it uses less digits than its factorization.

77490305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 77490305 is about 8802.8577746093. The cubic root of 77490305 is about 426.3331700466. Note that the first 3 decimals are identical.

The spelling of 77490305 in words is "seventy-seven million, four hundred ninety thousand, three hundred five".