394675537 has 2 divisors, whose sum is σ = 394675538. Its totient is φ = 394675536.

The previous prime is 394675517. The next prime is 394675613. The reversal of 394675537 is 735576493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221384641 + 173290896 = 14879^2 + 13164^2 .

It is an emirp because it is prime and its reverse (735576493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394675537 - 2⁷ = 394675409 is a prime.

It is not a weakly prime, because it can be changed into another prime (394675517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197337768 + 197337769.

It is an arithmetic number, because the mean of its divisors is an integer number (197337769).

Almost surely, 2^394675537 is an apocalyptic number.

It is an amenable number.

394675537 is a deficient number, since it is larger than the sum of its proper divisors (1).

394675537 is an equidigital number, since it uses as much as digits as its factorization.

394675537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2381400, while the sum is 49.

The square root of 394675537 is about 19866.4424847530. The cubic root of 394675537 is about 733.5224374346.

The spelling of 394675537 in words is "three hundred ninety-four million, six hundred seventy-five thousand, five hundred thirty-seven".