398031743 has 2 divisors, whose sum is σ = 398031744. Its totient is φ = 398031742.

The previous prime is 398031737. The next prime is 398031769. The reversal of 398031743 is 347130893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398031743 - 2¹⁶ = 397966207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398031697 and 398031706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398031143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199015871 + 199015872.

It is an arithmetic number, because the mean of its divisors is an integer number (199015872).

Almost surely, 2^398031743 is an apocalyptic number.

398031743 is a deficient number, since it is larger than the sum of its proper divisors (1).

398031743 is an equidigital number, since it uses as much as digits as its factorization.

398031743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 398031743 is about 19950.7328938062. The cubic root of 398031743 is about 735.5957919287.

The spelling of 398031743 in words is "three hundred ninety-eight million, thirty-one thousand, seven hundred forty-three".