77378353 has 4 divisors (see below), whose sum is σ = 83330548. Its totient is φ = 71426160.

The previous prime is 77378347. The next prime is 77378369. The reversal of 77378353 is 35387377.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9941409 + 67436944 = 3153^2 + 8212^2 .

It is not a de Polignac number, because 77378353 - 2¹⁷ = 77247281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77378303) 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, 2976078 + ... + 2976103.

It is an arithmetic number, because the mean of its divisors is an integer number (20832637).

Almost surely, 2^77378353 is an apocalyptic number.

It is an amenable number.

77378353 is a deficient number, since it is larger than the sum of its proper divisors (5952195).

77378353 is a wasteful number, since it uses less digits than its factorization.

77378353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952194.

The product of its digits is 370440, while the sum is 43.

The square root of 77378353 is about 8796.4966321826. The cubic root of 77378353 is about 426.1277600300.

The spelling of 77378353 in words is "seventy-seven million, three hundred seventy-eight thousand, three hundred fifty-three".