398849008381 has 2 divisors, whose sum is σ = 398849008382. Its totient is φ = 398849008380.

The previous prime is 398849008367. The next prime is 398849008433. The reversal of 398849008381 is 183800948893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357196280281 + 41652728100 = 597659^2 + 204090^2 .

It is a cyclic number.

It is not a de Polignac number, because 398849008381 - 2¹¹ = 398849006333 is a prime.

It is a super-2 number, since 2×398849008381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398849008321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199424504190 + 199424504191.

It is an arithmetic number, because the mean of its divisors is an integer number (199424504191).

Almost surely, 2^398849008381 is an apocalyptic number.

It is an amenable number.

398849008381 is a deficient number, since it is larger than the sum of its proper divisors (1).

398849008381 is an equidigital number, since it uses as much as digits as its factorization.

398849008381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11943936, while the sum is 61.

The spelling of 398849008381 in words is "three hundred ninety-eight billion, eight hundred forty-nine million, eight thousand, three hundred eighty-one".