609943897 has 2 divisors, whose sum is σ = 609943898. Its totient is φ = 609943896.

The previous prime is 609943891. The next prime is 609943903. The reversal of 609943897 is 798349906.

It is a balanced prime because it is at equal distance from previous prime (609943891) and next prime (609943903).

It can be written as a sum of positive squares in only one way, i.e., 322166601 + 287777296 = 17949^2 + 16964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609943897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (609943891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304971948 + 304971949.

It is an arithmetic number, because the mean of its divisors is an integer number (304971949).

Almost surely, 2^609943897 is an apocalyptic number.

It is an amenable number.

609943897 is a deficient number, since it is larger than the sum of its proper divisors (1).

609943897 is an equidigital number, since it uses as much as digits as its factorization.

609943897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 609943897 is about 24697.0422723046. The cubic root of 609943897 is about 848.0666077568.

The spelling of 609943897 in words is "six hundred nine million, nine hundred forty-three thousand, eight hundred ninety-seven".