612644897 has 2 divisors, whose sum is σ = 612644898. Its totient is φ = 612644896.

The previous prime is 612644887. The next prime is 612644983. The reversal of 612644897 is 798446216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 539354176 + 73290721 = 23224^2 + 8561^2 .

It is a cyclic number.

It is not a de Polignac number, because 612644897 - 2⁶ = 612644833 is a prime.

It is not a weakly prime, because it can be changed into another prime (612644867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306322448 + 306322449.

It is an arithmetic number, because the mean of its divisors is an integer number (306322449).

Almost surely, 2^612644897 is an apocalyptic number.

It is an amenable number.

612644897 is a deficient number, since it is larger than the sum of its proper divisors (1).

612644897 is an equidigital number, since it uses as much as digits as its factorization.

612644897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 612644897 is about 24751.6645298857. The cubic root of 612644897 is about 849.3165888534.

The spelling of 612644897 in words is "six hundred twelve million, six hundred forty-four thousand, eight hundred ninety-seven".