400148449 has 2 divisors, whose sum is σ = 400148450. Its totient is φ = 400148448.

The previous prime is 400148429. The next prime is 400148473. The reversal of 400148449 is 944841004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224400400 + 175748049 = 14980^2 + 13257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400148449 is a prime.

It is not a weakly prime, because it can be changed into another prime (400148429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200074224 + 200074225.

It is an arithmetic number, because the mean of its divisors is an integer number (200074225).

Almost surely, 2^400148449 is an apocalyptic number.

It is an amenable number.

400148449 is a deficient number, since it is larger than the sum of its proper divisors (1).

400148449 is an equidigital number, since it uses as much as digits as its factorization.

400148449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 400148449 is about 20003.7108807341. The cubic root of 400148449 is about 736.8974369200.

The spelling of 400148449 in words is "four hundred million, one hundred forty-eight thousand, four hundred forty-nine".