398070031 has 2 divisors, whose sum is σ = 398070032. Its totient is φ = 398070030.

The previous prime is 398069989. The next prime is 398070053. The reversal of 398070031 is 130070893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398070031 is a prime.

It is a super-2 number, since 2×398070031² = 316919499160681922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398069975 and 398070002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398070331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199035015 + 199035016.

It is an arithmetic number, because the mean of its divisors is an integer number (199035016).

Almost surely, 2^398070031 is an apocalyptic number.

398070031 is a deficient number, since it is larger than the sum of its proper divisors (1).

398070031 is an equidigital number, since it uses as much as digits as its factorization.

398070031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 398070031 is about 19951.6924344778. The cubic root of 398070031 is about 735.6193776428.

The spelling of 398070031 in words is "three hundred ninety-eight million, seventy thousand, thirty-one".