3123639797 has 2 divisors, whose sum is σ = 3123639798. Its totient is φ = 3123639796.

The previous prime is 3123639769. The next prime is 3123639809. The reversal of 3123639797 is 7979363213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1801662916 + 1321976881 = 42446^2 + 36359^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123639797 - 2²⁰ = 3122591221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123639737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561819898 + 1561819899.

It is an arithmetic number, because the mean of its divisors is an integer number (1561819899).

Almost surely, 2^3123639797 is an apocalyptic number.

It is an amenable number.

3123639797 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123639797 is an equidigital number, since it uses as much as digits as its factorization.

3123639797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 50.

The square root of 3123639797 is about 55889.5320878606. The cubic root of 3123639797 is about 1461.7967179122.

The spelling of 3123639797 in words is "three billion, one hundred twenty-three million, six hundred thirty-nine thousand, seven hundred ninety-seven".