1438732973 has 2 divisors, whose sum is σ = 1438732974. Its totient is φ = 1438732972.

The previous prime is 1438732969. The next prime is 1438733017. The reversal of 1438732973 is 3792378341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1278634564 + 160098409 = 35758^2 + 12653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438732973 - 2² = 1438732969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438732913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719366486 + 719366487.

It is an arithmetic number, because the mean of its divisors is an integer number (719366487).

Almost surely, 2^1438732973 is an apocalyptic number.

It is an amenable number.

1438732973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438732973 is an equidigital number, since it uses as much as digits as its factorization.

1438732973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The square root of 1438732973 is about 37930.6337015347. The cubic root of 1438732973 is about 1128.9119380110.

The spelling of 1438732973 in words is "one billion, four hundred thirty-eight million, seven hundred thirty-two thousand, nine hundred seventy-three".