77305939 has 4 divisors (see below), whose sum is σ = 77326200. Its totient is φ = 77285680.

The previous prime is 77305937. The next prime is 77305997. The reversal of 77305939 is 93950377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93950377 = 23 ⋅4084799.

It is a cyclic number.

It is not a de Polignac number, because 77305939 - 2¹ = 77305937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77305895 and 77305904.

It is not an unprimeable number, because it can be changed into a prime (77305931) 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, 2482 + ... + 12679.

It is an arithmetic number, because the mean of its divisors is an integer number (19331550).

Almost surely, 2^77305939 is an apocalyptic number.

77305939 is a deficient number, since it is larger than the sum of its proper divisors (20261).

77305939 is a wasteful number, since it uses less digits than its factorization.

77305939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20260.

The product of its (nonzero) digits is 178605, while the sum is 43.

The square root of 77305939 is about 8792.3795982658. The cubic root of 77305939 is about 425.9947889625.

The spelling of 77305939 in words is "seventy-seven million, three hundred five thousand, nine hundred thirty-nine".