812450609 has 2 divisors, whose sum is σ = 812450610. Its totient is φ = 812450608.

The previous prime is 812450599. The next prime is 812450663. The reversal of 812450609 is 906054218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804970384 + 7480225 = 28372^2 + 2735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812450609 is a prime.

It is a Chen prime.

It is equal to p_41753591 and since 812450609 and 41753591 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (812450809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406225304 + 406225305.

It is an arithmetic number, because the mean of its divisors is an integer number (406225305).

Almost surely, 2^812450609 is an apocalyptic number.

It is an amenable number.

812450609 is a deficient number, since it is larger than the sum of its proper divisors (1).

812450609 is an equidigital number, since it uses as much as digits as its factorization.

812450609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 812450609 is about 28503.5192388589. The cubic root of 812450609 is about 933.1088808767.

The spelling of 812450609 in words is "eight hundred twelve million, four hundred fifty thousand, six hundred nine".