40143450397 has 2 divisors, whose sum is σ = 40143450398. Its totient is φ = 40143450396.

The previous prime is 40143450343. The next prime is 40143450437. The reversal of 40143450397 is 79305434104.

40143450397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (40143450437) can be obtained adding 40143450397 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38286357561 + 1857092836 = 195669^2 + 43094^2 .

It is a cyclic number.

It is not a de Polignac number, because 40143450397 - 2³⁵ = 5783712029 is a prime.

It is a super-2 number, since 2×40143450397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40143450797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071725198 + 20071725199.

It is an arithmetic number, because the mean of its divisors is an integer number (20071725199).

Almost surely, 2^40143450397 is an apocalyptic number.

It is an amenable number.

40143450397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40143450397 is an equidigital number, since it uses as much as digits as its factorization.

40143450397 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 40143450397 in words is "forty billion, one hundred forty-three million, four hundred fifty thousand, three hundred ninety-seven".