40304145397 has 2 divisors, whose sum is σ = 40304145398. Its totient is φ = 40304145396.

The previous prime is 40304145391. The next prime is 40304145419. The reversal of 40304145397 is 79354140304.

40304145397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40021602916 + 282542481 = 200054^2 + 16809^2 .

It is a cyclic number.

It is not a de Polignac number, because 40304145397 - 2²⁷ = 40169927669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40304145391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152072698 + 20152072699.

It is an arithmetic number, because the mean of its divisors is an integer number (20152072699).

Almost surely, 2^40304145397 is an apocalyptic number.

It is an amenable number.

40304145397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40304145397 is an equidigital number, since it uses as much as digits as its factorization.

40304145397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 40304145397 in words is "forty billion, three hundred four million, one hundred forty-five thousand, three hundred ninety-seven".