77940077 has 8 divisors (see below), whose sum is σ = 81432960. Its totient is φ = 74455920.

The previous prime is 77940073. The next prime is 77940089. The reversal of 77940077 is 77004977.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77940077 - 2² = 77940073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77940073) 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 7 ways as a sum of consecutive naturals, for example, 21824 + ... + 25142.

It is an arithmetic number, because the mean of its divisors is an integer number (10179120).

Almost surely, 2^77940077 is an apocalyptic number.

It is an amenable number.

77940077 is a deficient number, since it is larger than the sum of its proper divisors (3492883).

77940077 is a wasteful number, since it uses less digits than its factorization.

77940077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 77940077 is about 8828.3677426804. The cubic root of 77940077 is about 427.1564253840.

The spelling of 77940077 in words is "seventy-seven million, nine hundred forty thousand, seventy-seven".