39463640837 has 2 divisors, whose sum is σ = 39463640838. Its totient is φ = 39463640836.

The previous prime is 39463640809. The next prime is 39463640849. The reversal of 39463640837 is 73804636493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23103696001 + 16359944836 = 151999^2 + 127906^2 .

It is a cyclic number.

It is not a de Polignac number, because 39463640837 - 2⁸ = 39463640581 is a prime.

It is a super-2 number, since 2×39463640837² (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 (39463640807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19731820418 + 19731820419.

It is an arithmetic number, because the mean of its divisors is an integer number (19731820419).

Almost surely, 2^39463640837 is an apocalyptic number.

It is an amenable number.

39463640837 is a deficient number, since it is larger than the sum of its proper divisors (1).

39463640837 is an equidigital number, since it uses as much as digits as its factorization.

39463640837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 53.

The spelling of 39463640837 in words is "thirty-nine billion, four hundred sixty-three million, six hundred forty thousand, eight hundred thirty-seven".