31420040417 has 2 divisors, whose sum is σ = 31420040418. Its totient is φ = 31420040416.

The previous prime is 31420040413. The next prime is 31420040419. The reversal of 31420040417 is 71404002413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17310401761 + 14109638656 = 131569^2 + 118784^2 .

It is a cyclic number.

It is not a de Polignac number, because 31420040417 - 2² = 31420040413 is a prime.

Together with 31420040419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31420040413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710020208 + 15710020209.

It is an arithmetic number, because the mean of its divisors is an integer number (15710020209).

Almost surely, 2^31420040417 is an apocalyptic number.

It is an amenable number.

31420040417 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420040417 is an equidigital number, since it uses as much as digits as its factorization.

31420040417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The spelling of 31420040417 in words is "thirty-one billion, four hundred twenty million, forty thousand, four hundred seventeen".