38629721887 has 2 divisors, whose sum is σ = 38629721888. Its totient is φ = 38629721886.

The previous prime is 38629721833. The next prime is 38629721903. The reversal of 38629721887 is 78812792683.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38629721887 is a prime.

It is a super-3 number, since 3×38629721887³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38629721827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19314860943 + 19314860944.

It is an arithmetic number, because the mean of its divisors is an integer number (19314860944).

Almost surely, 2^38629721887 is an apocalyptic number.

38629721887 is a deficient number, since it is larger than the sum of its proper divisors (1).

38629721887 is an equidigital number, since it uses as much as digits as its factorization.

38629721887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 61.

The spelling of 38629721887 in words is "thirty-eight billion, six hundred twenty-nine million, seven hundred twenty-one thousand, eight hundred eighty-seven".