398428652595431 has 2 divisors, whose sum is σ = 398428652595432. Its totient is φ = 398428652595430.

The previous prime is 398428652595287. The next prime is 398428652595503. The reversal of 398428652595431 is 134595256824893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398428652595431 - 2²² = 398428648401127 is a prime.

It is a super-2 number, since 2×398428652595431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398428652555431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199214326297715 + 199214326297716.

It is an arithmetic number, because the mean of its divisors is an integer number (199214326297716).

Almost surely, 2^{398428652595431} is an apocalyptic number.

398428652595431 is a deficient number, since it is larger than the sum of its proper divisors (1).

398428652595431 is an equidigital number, since it uses as much as digits as its factorization.

398428652595431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488000, while the sum is 74.

The spelling of 398428652595431 in words is "three hundred ninety-eight trillion, four hundred twenty-eight billion, six hundred fifty-two million, five hundred ninety-five thousand, four hundred thirty-one".