403399649 has 4 divisors (see below), whose sum is σ = 410012820. Its totient is φ = 396786480.

The previous prime is 403399639. The next prime is 403399669. The reversal of 403399649 is 946993304.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145636624 + 257763025 = 12068^2 + 16055^2 .

It is a cyclic number.

It is not a de Polignac number, because 403399649 - 2²⁰ = 402351073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403399609) 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 in 3 ways as a sum of consecutive naturals, for example, 3306494 + ... + 3306615.

It is an arithmetic number, because the mean of its divisors is an integer number (102503205).

Almost surely, 2^403399649 is an apocalyptic number.

It is an amenable number.

403399649 is a deficient number, since it is larger than the sum of its proper divisors (6613171).

403399649 is an equidigital number, since it uses as much as digits as its factorization.

403399649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613170.

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 403399649 is about 20084.8114006580. The cubic root of 403399649 is about 738.8878161311.

The spelling of 403399649 in words is "four hundred three million, three hundred ninety-nine thousand, six hundred forty-nine".