404140349 has 2 divisors, whose sum is σ = 404140350. Its totient is φ = 404140348.

The previous prime is 404140277. The next prime is 404140351. The reversal of 404140349 is 943041404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296872900 + 107267449 = 17230^2 + 10357^2 .

It is a cyclic number.

It is not a de Polignac number, because 404140349 - 2¹⁶ = 404074813 is a prime.

Together with 404140351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404140049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202070174 + 202070175.

It is an arithmetic number, because the mean of its divisors is an integer number (202070175).

Almost surely, 2^404140349 is an apocalyptic number.

It is an amenable number.

404140349 is a deficient number, since it is larger than the sum of its proper divisors (1).

404140349 is an equidigital number, since it uses as much as digits as its factorization.

404140349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 404140349 is about 20103.2422509405. The cubic root of 404140349 is about 739.3397745282.

The spelling of 404140349 in words is "four hundred four million, one hundred forty thousand, three hundred forty-nine".