39729273487 has 2 divisors, whose sum is σ = 39729273488. Its totient is φ = 39729273486.

The previous prime is 39729273469. The next prime is 39729273497. The reversal of 39729273487 is 78437292793.

It is a strong prime.

It is an emirp because it is prime and its reverse (78437292793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39729273487 is a prime.

It is a super-2 number, since 2×39729273487² (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 (39729273407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19864636743 + 19864636744.

It is an arithmetic number, because the mean of its divisors is an integer number (19864636744).

Almost surely, 2^39729273487 is an apocalyptic number.

39729273487 is a deficient number, since it is larger than the sum of its proper divisors (1).

39729273487 is an equidigital number, since it uses as much as digits as its factorization.

39729273487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32006016, while the sum is 61.

The spelling of 39729273487 in words is "thirty-nine billion, seven hundred twenty-nine million, two hundred seventy-three thousand, four hundred eighty-seven".