340521143477 has 2 divisors, whose sum is σ = 340521143478. Its totient is φ = 340521143476.

The previous prime is 340521143393. The next prime is 340521143491. The reversal of 340521143477 is 774341125043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226767392401 + 113753751076 = 476201^2 + 337274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340521143477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340521146477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170260571738 + 170260571739.

It is an arithmetic number, because the mean of its divisors is an integer number (170260571739).

Almost surely, 2^340521143477 is an apocalyptic number.

It is an amenable number.

340521143477 is a deficient number, since it is larger than the sum of its proper divisors (1).

340521143477 is an equidigital number, since it uses as much as digits as its factorization.

340521143477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 340521143477 in words is "three hundred forty billion, five hundred twenty-one million, one hundred forty-three thousand, four hundred seventy-seven".