1438131979 has 2 divisors, whose sum is σ = 1438131980. Its totient is φ = 1438131978.

The previous prime is 1438131977. The next prime is 1438131997. The reversal of 1438131979 is 9791318341.

Together with next prime (1438131997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1438131979 - 2¹ = 1438131977 is a prime.

Together with 1438131977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1438131977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719065989 + 719065990.

It is an arithmetic number, because the mean of its divisors is an integer number (719065990).

Almost surely, 2^1438131979 is an apocalyptic number.

1438131979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438131979 is an equidigital number, since it uses as much as digits as its factorization.

1438131979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 1438131979 is about 37922.7105966860. The cubic root of 1438131979 is about 1128.7547247298.

It can be divided in two parts, 14381 and 31979, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 1438131979 in words is "one billion, four hundred thirty-eight million, one hundred thirty-one thousand, nine hundred seventy-nine".