400407942097 has 2 divisors, whose sum is σ = 400407942098. Its totient is φ = 400407942096.

The previous prime is 400407942091. The next prime is 400407942163. The reversal of 400407942097 is 790249704004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387183862081 + 13224080016 = 622241^2 + 114996^2 .

It is a cyclic number.

It is not a de Polignac number, because 400407942097 - 2²⁷ = 400273724369 is a prime.

It is not a weakly prime, because it can be changed into another prime (400407942091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200203971048 + 200203971049.

It is an arithmetic number, because the mean of its divisors is an integer number (200203971049).

Almost surely, 2^400407942097 is an apocalyptic number.

It is an amenable number.

400407942097 is a deficient number, since it is larger than the sum of its proper divisors (1).

400407942097 is an equidigital number, since it uses as much as digits as its factorization.

400407942097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 400407942097 in words is "four hundred billion, four hundred seven million, nine hundred forty-two thousand, ninety-seven".