812134901 has 4 divisors (see below), whose sum is σ = 818529792. Its totient is φ = 805740012.

The previous prime is 812134891. The next prime is 812134903. The reversal of 812134901 is 109431218.

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 a de Polignac number, because none of the positive numbers 2^k-812134901 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 (812134903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197255 + ... + 3197508.

It is an arithmetic number, because the mean of its divisors is an integer number (204632448).

Almost surely, 2^812134901 is an apocalyptic number.

It is an amenable number.

812134901 is a deficient number, since it is larger than the sum of its proper divisors (6394891).

812134901 is a wasteful number, since it uses less digits than its factorization.

812134901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6394890.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 812134901 is about 28497.9806477582. The cubic root of 812134901 is about 932.9880004599.

The spelling of 812134901 in words is "eight hundred twelve million, one hundred thirty-four thousand, nine hundred one".