403942673 has 4 divisors (see below), whose sum is σ = 404435508. Its totient is φ = 403449840.

The previous prime is 403942663. The next prime is 403942699. The reversal of 403942673 is 376249304.

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 170250304 + 233692369 = 13048^2 + 15287^2 .

It is a cyclic number.

It is not a de Polignac number, because 403942673 - 2¹⁶ = 403877137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (403942613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245186 + ... + 246827.

It is an arithmetic number, because the mean of its divisors is an integer number (101108877).

Almost surely, 2^403942673 is an apocalyptic number.

It is an amenable number.

403942673 is a deficient number, since it is larger than the sum of its proper divisors (492835).

403942673 is an equidigital number, since it uses as much as digits as its factorization.

403942673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492834.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 403942673 is about 20098.3251292241. The cubic root of 403942673 is about 739.2192111606.

The spelling of 403942673 in words is "four hundred three million, nine hundred forty-two thousand, six hundred seventy-three".