77343853 has 4 divisors (see below), whose sum is σ = 79838848. Its totient is φ = 74848860.

The previous prime is 77343839. The next prime is 77343857. The reversal of 77343853 is 35834377.

It is a happy number.

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 not a de Polignac number, because 77343853 - 2⁵ = 77343821 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 (77343857) 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, 1247451 + ... + 1247512.

It is an arithmetic number, because the mean of its divisors is an integer number (19959712).

Almost surely, 2^77343853 is an apocalyptic number.

It is an amenable number.

77343853 is a deficient number, since it is larger than the sum of its proper divisors (2494995).

77343853 is a wasteful number, since it uses less digits than its factorization.

77343853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494994.

The product of its digits is 211680, while the sum is 40.

The square root of 77343853 is about 8794.5354055800. The cubic root of 77343853 is about 426.0644193470.

The spelling of 77343853 in words is "seventy-seven million, three hundred forty-three thousand, eight hundred fifty-three".