398140007 has 2 divisors, whose sum is σ = 398140008. Its totient is φ = 398140006.

The previous prime is 398139941. The next prime is 398140027. The reversal of 398140007 is 700041893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398140007 - 2⁸ = 398139751 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 (398140027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199070003 + 199070004.

It is an arithmetic number, because the mean of its divisors is an integer number (199070004).

Almost surely, 2^398140007 is an apocalyptic number.

398140007 is a deficient number, since it is larger than the sum of its proper divisors (1).

398140007 is an equidigital number, since it uses as much as digits as its factorization.

398140007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 398140007 is about 19953.4459931111. The cubic root of 398140007 is about 735.6624795106.

The spelling of 398140007 in words is "three hundred ninety-eight million, one hundred forty thousand, seven".