398237029 has 2 divisors, whose sum is σ = 398237030. Its totient is φ = 398237028.

The previous prime is 398237027. The next prime is 398237069. The reversal of 398237029 is 920732893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364886404 + 33350625 = 19102^2 + 5775^2 .

It is a cyclic number.

It is not a de Polignac number, because 398237029 - 2¹ = 398237027 is a prime.

Together with 398237027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398237027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199118514 + 199118515.

It is an arithmetic number, because the mean of its divisors is an integer number (199118515).

Almost surely, 2^398237029 is an apocalyptic number.

It is an amenable number.

398237029 is a deficient number, since it is larger than the sum of its proper divisors (1).

398237029 is an equidigital number, since it uses as much as digits as its factorization.

398237029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 398237029 is about 19955.8770541412. The cubic root of 398237029 is about 735.7222320657.

The spelling of 398237029 in words is "three hundred ninety-eight million, two hundred thirty-seven thousand, twenty-nine".