39677742623 has 2 divisors, whose sum is σ = 39677742624. Its totient is φ = 39677742622.

The previous prime is 39677742619. The next prime is 39677742647. The reversal of 39677742623 is 32624777693.

It is a weak prime.

It is an emirp because it is prime and its reverse (32624777693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39677742623 - 2² = 39677742619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39677742613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19838871311 + 19838871312.

It is an arithmetic number, because the mean of its divisors is an integer number (19838871312).

Almost surely, 2^39677742623 is an apocalyptic number.

39677742623 is a deficient number, since it is larger than the sum of its proper divisors (1).

39677742623 is an equidigital number, since it uses as much as digits as its factorization.

39677742623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 56.

The spelling of 39677742623 in words is "thirty-nine billion, six hundred seventy-seven million, seven hundred forty-two thousand, six hundred twenty-three".