400487673 has 4 divisors (see below), whose sum is σ = 533983568. Its totient is φ = 266991780.

The previous prime is 400487671. The next prime is 400487749. The reversal of 400487673 is 376784004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 400487673 - 2¹ = 400487671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400487671) 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, 66747943 + ... + 66747948.

It is an arithmetic number, because the mean of its divisors is an integer number (133495892).

Almost surely, 2^400487673 is an apocalyptic number.

It is an amenable number.

400487673 is a deficient number, since it is larger than the sum of its proper divisors (133495895).

400487673 is a wasteful number, since it uses less digits than its factorization.

400487673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133495894.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 400487673 is about 20012.1881112486. The cubic root of 400487673 is about 737.1056119045.

The spelling of 400487673 in words is "four hundred million, four hundred eighty-seven thousand, six hundred seventy-three".