398653948937 has 2 divisors, whose sum is σ = 398653948938. Its totient is φ = 398653948936.

The previous prime is 398653948933. The next prime is 398653948963. The reversal of 398653948937 is 739849356893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243842390416 + 154811558521 = 493804^2 + 393461^2 .

It is an emirp because it is prime and its reverse (739849356893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398653948937 - 2² = 398653948933 is a prime.

It is not a weakly prime, because it can be changed into another prime (398653948933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199326974468 + 199326974469.

It is an arithmetic number, because the mean of its divisors is an integer number (199326974469).

Almost surely, 2^398653948937 is an apocalyptic number.

It is an amenable number.

398653948937 is a deficient number, since it is larger than the sum of its proper divisors (1).

398653948937 is an equidigital number, since it uses as much as digits as its factorization.

398653948937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058158080, while the sum is 74.

The spelling of 398653948937 in words is "three hundred ninety-eight billion, six hundred fifty-three million, nine hundred forty-eight thousand, nine hundred thirty-seven".