812877601 has 4 divisors (see below), whose sum is σ = 812938672. Its totient is φ = 812816532.

The previous prime is 812877599. The next prime is 812877613. The reversal of 812877601 is 106778218.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 106778218 = 2 ⋅53389109.

It is a cyclic number.

It is not a de Polignac number, because 812877601 - 2¹ = 812877599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812877641) 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, 1131 + ... + 40336.

It is an arithmetic number, because the mean of its divisors is an integer number (203234668).

Almost surely, 2^812877601 is an apocalyptic number.

It is an amenable number.

812877601 is a deficient number, since it is larger than the sum of its proper divisors (61071).

812877601 is a wasteful number, since it uses less digits than its factorization.

812877601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61070.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 812877601 is about 28511.0084178024. The cubic root of 812877601 is about 933.2723206573.

It can be divided in two parts, 81287 and 7601, that added together give a palindrome (88888).

The spelling of 812877601 in words is "eight hundred twelve million, eight hundred seventy-seven thousand, six hundred one".