420400154533393 has 2 divisors, whose sum is σ = 420400154533394. Its totient is φ = 420400154533392.

The previous prime is 420400154533363. The next prime is 420400154533451. The reversal of 420400154533393 is 393335451004024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213070307037184 + 207329847496209 = 14596928^2 + 14398953^2 .

It is a cyclic number.

It is not a de Polignac number, because 420400154533393 - 2⁹ = 420400154532881 is a prime.

It is a super-3 number, since 3×420400154533393³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (420400154533363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210200077266696 + 210200077266697.

It is an arithmetic number, because the mean of its divisors is an integer number (210200077266697).

Almost surely, 2^{420400154533393} is an apocalyptic number.

It is an amenable number.

420400154533393 is a deficient number, since it is larger than the sum of its proper divisors (1).

420400154533393 is an equidigital number, since it uses as much as digits as its factorization.

420400154533393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 420400154533393 in words is "four hundred twenty trillion, four hundred billion, one hundred fifty-four million, five hundred thirty-three thousand, three hundred ninety-three".