401000549 has 2 divisors, whose sum is σ = 401000550. Its totient is φ = 401000548.

The previous prime is 401000533. The next prime is 401000557. The reversal of 401000549 is 945000104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396408100 + 4592449 = 19910^2 + 2143^2 .

It is a cyclic number.

It is not a de Polignac number, because 401000549 - 2⁴ = 401000533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401000449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200500274 + 200500275.

It is an arithmetic number, because the mean of its divisors is an integer number (200500275).

Almost surely, 2^401000549 is an apocalyptic number.

It is an amenable number.

401000549 is a deficient number, since it is larger than the sum of its proper divisors (1).

401000549 is an equidigital number, since it uses as much as digits as its factorization.

401000549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 401000549 is about 20024.9981023719. The cubic root of 401000549 is about 737.4201305444.

The spelling of 401000549 in words is "four hundred one million, five hundred forty-nine", and thus it is an aban number.