812577434 has 4 divisors (see below), whose sum is σ = 1218866154. Its totient is φ = 406288716.

The previous prime is 812577431. The next prime is 812577449. The reversal of 812577434 is 434775218.

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

It can be written as a sum of positive squares in only one way, i.e., 667447225 + 145130209 = 25835^2 + 12047^2 .

It is a junction number, because it is equal to n+sod(n) for n = 812577391 and 812577400.

It is not an unprimeable number, because it can be changed into a prime (812577431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203144357 + ... + 203144360.

Almost surely, 2^812577434 is an apocalyptic number.

812577434 is a deficient number, since it is larger than the sum of its proper divisors (406288720).

812577434 is a wasteful number, since it uses less digits than its factorization.

812577434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406288719.

The product of its digits is 188160, while the sum is 41.

The square root of 812577434 is about 28505.7438773311. The cubic root of 812577434 is about 933.1574316749.

The spelling of 812577434 in words is "eight hundred twelve million, five hundred seventy-seven thousand, four hundred thirty-four".