400031040973 has 2 divisors, whose sum is σ = 400031040974. Its totient is φ = 400031040972.

The previous prime is 400031040971. The next prime is 400031041013. The reversal of 400031040973 is 379040130004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398895822724 + 1135218249 = 631582^2 + 33693^2 .

It is a cyclic number.

It is not a de Polignac number, because 400031040973 - 2¹ = 400031040971 is a prime.

Together with 400031040971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400031040971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200015520486 + 200015520487.

It is an arithmetic number, because the mean of its divisors is an integer number (200015520487).

Almost surely, 2^400031040973 is an apocalyptic number.

It is an amenable number.

400031040973 is a deficient number, since it is larger than the sum of its proper divisors (1).

400031040973 is an equidigital number, since it uses as much as digits as its factorization.

400031040973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 400031040973 its reverse (379040130004), we get a palindrome (779071170977).

The spelling of 400031040973 in words is "four hundred billion, thirty-one million, forty thousand, nine hundred seventy-three".