648858937 has 2 divisors, whose sum is σ = 648858938. Its totient is φ = 648858936.

The previous prime is 648858901. The next prime is 648858953. The reversal of 648858937 is 739858846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453306681 + 195552256 = 21291^2 + 13984^2 .

It is a cyclic number.

It is not a de Polignac number, because 648858937 - 2²³ = 640470329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (648858337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324429468 + 324429469.

It is an arithmetic number, because the mean of its divisors is an integer number (324429469).

Almost surely, 2^648858937 is an apocalyptic number.

It is an amenable number.

648858937 is a deficient number, since it is larger than the sum of its proper divisors (1).

648858937 is an equidigital number, since it uses as much as digits as its factorization.

648858937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 58.

The square root of 648858937 is about 25472.7096517037. The cubic root of 648858937 is about 865.7319195208.

Subtracting 648858937 from its reverse (739858846), we obtain a palindrome (90999909).

The spelling of 648858937 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, nine hundred thirty-seven".