405040949 has 2 divisors, whose sum is σ = 405040950. Its totient is φ = 405040948.

The previous prime is 405040939. The next prime is 405040967. The reversal of 405040949 is 949040504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404412100 + 628849 = 20110^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 405040949 - 2²⁸ = 136605493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405040939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202520474 + 202520475.

It is an arithmetic number, because the mean of its divisors is an integer number (202520475).

Almost surely, 2^405040949 is an apocalyptic number.

It is an amenable number.

405040949 is a deficient number, since it is larger than the sum of its proper divisors (1).

405040949 is an equidigital number, since it uses as much as digits as its factorization.

405040949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 405040949 is about 20125.6291578673. The cubic root of 405040949 is about 739.8885569942. Note that the first 3 decimals are identical.

The spelling of 405040949 in words is "four hundred five million, forty thousand, nine hundred forty-nine".