1438340747 has 2 divisors, whose sum is σ = 1438340748. Its totient is φ = 1438340746.

The previous prime is 1438340723. The next prime is 1438340749. The reversal of 1438340747 is 7470438341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1438340747 - 2²² = 1434146443 is a prime.

Together with 1438340749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1438340749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719170373 + 719170374.

It is an arithmetic number, because the mean of its divisors is an integer number (719170374).

Almost surely, 2^1438340747 is an apocalyptic number.

1438340747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438340747 is an equidigital number, since it uses as much as digits as its factorization.

1438340747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 1438340747 is about 37925.4630426578. The cubic root of 1438340747 is about 1128.8093410580.

The spelling of 1438340747 in words is "one billion, four hundred thirty-eight million, three hundred forty thousand, seven hundred forty-seven".