340521143393 has 2 divisors, whose sum is σ = 340521143394. Its totient is φ = 340521143392.

The previous prime is 340521143387. The next prime is 340521143477. The reversal of 340521143393 is 393341125043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269867782144 + 70653361249 = 519488^2 + 265807^2 .

It is a cyclic number.

It is not a de Polignac number, because 340521143393 - 2¹² = 340521139297 is a prime.

It is not a weakly prime, because it can be changed into another prime (340521142393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170260571696 + 170260571697.

It is an arithmetic number, because the mean of its divisors is an integer number (170260571697).

Almost surely, 2^340521143393 is an apocalyptic number.

It is an amenable number.

340521143393 is a deficient number, since it is larger than the sum of its proper divisors (1).

340521143393 is an equidigital number, since it uses as much as digits as its factorization.

340521143393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 340521143393 in words is "three hundred forty billion, five hundred twenty-one million, one hundred forty-three thousand, three hundred ninety-three".