39920537951269 has 2 divisors, whose sum is σ = 39920537951270. Its totient is φ = 39920537951268.

The previous prime is 39920537951267. The next prime is 39920537951381. The reversal of 39920537951269 is 96215973502993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29695284638244 + 10225253313025 = 5449338^2 + 3197695^2 .

It is a cyclic number.

It is not a de Polignac number, because 39920537951269 - 2¹ = 39920537951267 is a prime.

It is a super-2 number, since 2×39920537951269² (a number of 28 digits) contains 22 as substring.

Together with 39920537951267, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 39920537951198 and 39920537951207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39920537951267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19960268975634 + 19960268975635.

It is an arithmetic number, because the mean of its divisors is an integer number (19960268975635).

Almost surely, 2^{39920537951269} is an apocalyptic number.

It is an amenable number.

39920537951269 is a deficient number, since it is larger than the sum of its proper divisors (1).

39920537951269 is an equidigital number, since it uses as much as digits as its factorization.

39920537951269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248005800, while the sum is 70.

The spelling of 39920537951269 in words is "thirty-nine trillion, nine hundred twenty billion, five hundred thirty-seven million, nine hundred fifty-one thousand, two hundred sixty-nine".