812017601 has 2 divisors, whose sum is σ = 812017602. Its totient is φ = 812017600.

The previous prime is 812017523. The next prime is 812017607. The reversal of 812017601 is 106710218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558093376 + 253924225 = 23624^2 + 15935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812017601 is a prime.

It is not a weakly prime, because it can be changed into another prime (812017607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406008800 + 406008801.

It is an arithmetic number, because the mean of its divisors is an integer number (406008801).

Almost surely, 2^812017601 is an apocalyptic number.

It is an amenable number.

812017601 is a deficient number, since it is larger than the sum of its proper divisors (1).

812017601 is an equidigital number, since it uses as much as digits as its factorization.

812017601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 812017601 is about 28495.9225328818. The cubic root of 812017601 is about 932.9430798596.

Adding to 812017601 its reverse (106710218), we get a palindrome (918727819).

The spelling of 812017601 in words is "eight hundred twelve million, seventeen thousand, six hundred one".