1438518047 has 2 divisors, whose sum is σ = 1438518048. Its totient is φ = 1438518046.

The previous prime is 1438518041. The next prime is 1438518091. The reversal of 1438518047 is 7408158341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1438518047 - 2¹⁰ = 1438517023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1438517995 and 1438518013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438518041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719259023 + 719259024.

It is an arithmetic number, because the mean of its divisors is an integer number (719259024).

Almost surely, 2^1438518047 is an apocalyptic number.

1438518047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438518047 is an equidigital number, since it uses as much as digits as its factorization.

1438518047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 1438518047 is about 37927.8004503293. The cubic root of 1438518047 is about 1128.8557208128.

The spelling of 1438518047 in words is "one billion, four hundred thirty-eight million, five hundred eighteen thousand, forty-seven".