838897949 has 2 divisors, whose sum is σ = 838897950. Its totient is φ = 838897948.

The previous prime is 838897909. The next prime is 838897967. The reversal of 838897949 is 949798838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506565049 + 332332900 = 22507^2 + 18230^2 .

It is a cyclic number.

It is not a de Polignac number, because 838897949 - 2⁸ = 838897693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838897909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419448974 + 419448975.

It is an arithmetic number, because the mean of its divisors is an integer number (419448975).

Almost surely, 2^838897949 is an apocalyptic number.

It is an amenable number.

838897949 is a deficient number, since it is larger than the sum of its proper divisors (1).

838897949 is an equidigital number, since it uses as much as digits as its factorization.

838897949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 65.

The square root of 838897949 is about 28963.7350664585. The cubic root of 838897949 is about 943.1259853709.

The spelling of 838897949 in words is "eight hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred forty-nine".