812916001 has 4 divisors (see below), whose sum is σ = 813051904. Its totient is φ = 812780100.

The previous prime is 812915993. The next prime is 812916017. The reversal of 812916001 is 100619218.

It is a happy number.

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 not a de Polignac number, because 812916001 - 2³ = 812915993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812916031) 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, 58545 + ... + 71086.

It is an arithmetic number, because the mean of its divisors is an integer number (203262976).

Almost surely, 2^812916001 is an apocalyptic number.

It is an amenable number.

812916001 is a deficient number, since it is larger than the sum of its proper divisors (135903).

812916001 is a wasteful number, since it uses less digits than its factorization.

812916001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135902.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 812916001 is about 28511.6818339431. The cubic root of 812916001 is about 933.2870162248.

The spelling of 812916001 in words is "eight hundred twelve million, nine hundred sixteen thousand, one".