438986212117 has 2 divisors, whose sum is σ = 438986212118. Its totient is φ = 438986212116.

The previous prime is 438986212051. The next prime is 438986212121. The reversal of 438986212117 is 711212689834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265004625796 + 173981586321 = 514786^2 + 417111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438986212117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438986216117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219493106058 + 219493106059.

It is an arithmetic number, because the mean of its divisors is an integer number (219493106059).

Almost surely, 2^438986212117 is an apocalyptic number.

It is an amenable number.

438986212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

438986212117 is an equidigital number, since it uses as much as digits as its factorization.

438986212117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The spelling of 438986212117 in words is "four hundred thirty-eight billion, nine hundred eighty-six million, two hundred twelve thousand, one hundred seventeen".