77348009 has 4 divisors (see below), whose sum is σ = 77442816. Its totient is φ = 77253204.

The previous prime is 77347981. The next prime is 77348023. The reversal of 77348009 is 90084377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77348009 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (77348309) 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 in 3 ways as a sum of consecutive naturals, for example, 46169 + ... + 47814.

It is an arithmetic number, because the mean of its divisors is an integer number (19360704).

Almost surely, 2^77348009 is an apocalyptic number.

It is an amenable number.

77348009 is a deficient number, since it is larger than the sum of its proper divisors (94807).

77348009 is an equidigital number, since it uses as much as digits as its factorization.

77348009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94806.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 77348009 is about 8794.7716854959. The cubic root of 77348009 is about 426.0720506020.

The spelling of 77348009 in words is "seventy-seven million, three hundred forty-eight thousand, nine".