1438495901 has 2 divisors, whose sum is σ = 1438495902. Its totient is φ = 1438495900.

The previous prime is 1438495847. The next prime is 1438495907. The reversal of 1438495901 is 1095948341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1437547225 + 948676 = 37915^2 + 974^2 .

It is an emirp because it is prime and its reverse (1095948341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1438495901 - 2¹⁰ = 1438494877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438495907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719247950 + 719247951.

It is an arithmetic number, because the mean of its divisors is an integer number (719247951).

Almost surely, 2^1438495901 is an apocalyptic number.

It is an amenable number.

1438495901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438495901 is an equidigital number, since it uses as much as digits as its factorization.

1438495901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1438495901 is about 37927.5084997683. The cubic root of 1438495901 is about 1128.8499278679.

The spelling of 1438495901 in words is "one billion, four hundred thirty-eight million, four hundred ninety-five thousand, nine hundred one".