403643869 has 8 divisors (see below), whose sum is σ = 431795448. Its totient is φ = 375982080.

The previous prime is 403643819. The next prime is 403643941. The reversal of 403643869 is 968346304.

It can be written as a sum of positive squares in 4 ways, for example, as 11088900 + 392554969 = 3330^2 + 19813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 403643869 - 2¹⁵ = 403611101 is a prime.

It is a super-2 number, since 2×403643869² = 325856745962578322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403643819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120742 + ... + 124039.

It is an arithmetic number, because the mean of its divisors is an integer number (53974431).

Almost surely, 2^403643869 is an apocalyptic number.

It is an amenable number.

403643869 is a deficient number, since it is larger than the sum of its proper divisors (28151579).

403643869 is a wasteful number, since it uses less digits than its factorization.

403643869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244895.

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 403643869 is about 20090.8901992918. The cubic root of 403643869 is about 739.0368947432.

The spelling of 403643869 in words is "four hundred three million, six hundred forty-three thousand, eight hundred sixty-nine".