39943520276497 has 2 divisors, whose sum is σ = 39943520276498. Its totient is φ = 39943520276496.

The previous prime is 39943520276461. The next prime is 39943520276519. The reversal of 39943520276497 is 79467202534993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29537224953856 + 10406295322641 = 5434816^2 + 3225879^2 .

It is a cyclic number.

It is not a de Polignac number, because 39943520276497 - 2⁷ = 39943520276369 is a prime.

It is a super-3 number, since 3×39943520276497³ (a number of 42 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (39943520376497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19971760138248 + 19971760138249.

It is an arithmetic number, because the mean of its divisors is an integer number (19971760138249).

Almost surely, 2^{39943520276497} is an apocalyptic number.

It is an amenable number.

39943520276497 is a deficient number, since it is larger than the sum of its proper divisors (1).

39943520276497 is an equidigital number, since it uses as much as digits as its factorization.

39943520276497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617258880, while the sum is 70.

The spelling of 39943520276497 in words is "thirty-nine trillion, nine hundred forty-three billion, five hundred twenty million, two hundred seventy-six thousand, four hundred ninety-seven".