39628478623 has 2 divisors, whose sum is σ = 39628478624. Its totient is φ = 39628478622.

The previous prime is 39628478597. The next prime is 39628478639. The reversal of 39628478623 is 32687482693.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39628478623 is a prime.

It is a super-2 number, since 2×39628478623² (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 (39628478653) 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, 19814239311 + 19814239312.

It is an arithmetic number, because the mean of its divisors is an integer number (19814239312).

Almost surely, 2^39628478623 is an apocalyptic number.

39628478623 is a deficient number, since it is larger than the sum of its proper divisors (1).

39628478623 is an equidigital number, since it uses as much as digits as its factorization.

39628478623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 58.

The spelling of 39628478623 in words is "thirty-nine billion, six hundred twenty-eight million, four hundred seventy-eight thousand, six hundred twenty-three".