1438254947 has 2 divisors, whose sum is σ = 1438254948. Its totient is φ = 1438254946.

The previous prime is 1438254931. The next prime is 1438254967. The reversal of 1438254947 is 7494528341.

It is a weak prime.

It is an emirp because it is prime and its reverse (7494528341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1438254947 - 2⁴ = 1438254931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1438254967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719127473 + 719127474.

It is an arithmetic number, because the mean of its divisors is an integer number (719127474).

Almost surely, 2^1438254947 is an apocalyptic number.

1438254947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438254947 is an equidigital number, since it uses as much as digits as its factorization.

1438254947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 1438254947 is about 37924.3318596386. The cubic root of 1438254947 is about 1128.7868953412.

The spelling of 1438254947 in words is "one billion, four hundred thirty-eight million, two hundred fifty-four thousand, nine hundred forty-seven".