393042049 has 2 divisors, whose sum is σ = 393042050. Its totient is φ = 393042048.

The previous prime is 393042007. The next prime is 393042053. The reversal of 393042049 is 940240393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361760400 + 31281649 = 19020^2 + 5593^2 .

It is an emirp because it is prime and its reverse (940240393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 393042049 - 2¹¹ = 393040001 is a prime.

It is not a weakly prime, because it can be changed into another prime (393042079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196521024 + 196521025.

It is an arithmetic number, because the mean of its divisors is an integer number (196521025).

Almost surely, 2^393042049 is an apocalyptic number.

It is an amenable number.

393042049 is a deficient number, since it is larger than the sum of its proper divisors (1).

393042049 is an equidigital number, since it uses as much as digits as its factorization.

393042049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 393042049 is about 19825.2881189656. The cubic root of 393042049 is about 732.5090675142.

The spelling of 393042049 in words is "three hundred ninety-three million, forty-two thousand, forty-nine".