77793453 has 20 divisors (see below), whose sum is σ = 118409148. Its totient is φ = 50880960.

The previous prime is 77793449. The next prime is 77793461. The reversal of 77793453 is 35439777.

It can be written as a sum of positive squares in 2 ways, for example, as 41757444 + 36036009 = 6462^2 + 6003^2 .

It is not a de Polignac number, because 77793453 - 2² = 77793449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77793399 and 77793408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77793953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4768 + ... + 13353.

Almost surely, 2^77793453 is an apocalyptic number.

It is an amenable number.

77793453 is a deficient number, since it is larger than the sum of its proper divisors (40615695).

77793453 is a wasteful number, since it uses less digits than its factorization.

77793453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186 (or 18177 counting only the distinct ones).

The product of its digits is 555660, while the sum is 45.

The square root of 77793453 is about 8820.0596936755. The cubic root of 77793453 is about 426.8883959691. Note that the first 3 decimals are identical.

The spelling of 77793453 in words is "seventy-seven million, seven hundred ninety-three thousand, four hundred fifty-three".