400034073391 has 2 divisors, whose sum is σ = 400034073392. Its totient is φ = 400034073390.

The previous prime is 400034073389. The next prime is 400034073401. The reversal of 400034073391 is 193370430004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400034073391 - 2¹ = 400034073389 is a prime.

Together with 400034073389, 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 (400034013391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200017036695 + 200017036696.

It is an arithmetic number, because the mean of its divisors is an integer number (200017036696).

Almost surely, 2^400034073391 is an apocalyptic number.

400034073391 is a deficient number, since it is larger than the sum of its proper divisors (1).

400034073391 is an equidigital number, since it uses as much as digits as its factorization.

400034073391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

The spelling of 400034073391 in words is "four hundred billion, thirty-four million, seventy-three thousand, three hundred ninety-one".