400407005797 has 2 divisors, whose sum is σ = 400407005798. Its totient is φ = 400407005796.

The previous prime is 400407005783. The next prime is 400407005807. The reversal of 400407005797 is 797500704004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231013848321 + 169393157476 = 480639^2 + 411574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400407005797 is a prime.

It is a super-3 number, since 3×400407005797³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400407005737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200203502898 + 200203502899.

It is an arithmetic number, because the mean of its divisors is an integer number (200203502899).

Almost surely, 2^400407005797 is an apocalyptic number.

It is an amenable number.

400407005797 is a deficient number, since it is larger than the sum of its proper divisors (1).

400407005797 is an equidigital number, since it uses as much as digits as its factorization.

400407005797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 400407005797 in words is "four hundred billion, four hundred seven million, five thousand, seven hundred ninety-seven".