438032981 has 2 divisors, whose sum is σ = 438032982. Its totient is φ = 438032980.

The previous prime is 438032963. The next prime is 438032989. The reversal of 438032981 is 189230834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275062225 + 162970756 = 16585^2 + 12766^2 .

It is a cyclic number.

It is not a de Polignac number, because 438032981 - 2¹⁴ = 438016597 is a prime.

It is a super-2 number, since 2×438032981² = 383745784887492722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438032989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219016490 + 219016491.

It is an arithmetic number, because the mean of its divisors is an integer number (219016491).

Almost surely, 2^438032981 is an apocalyptic number.

It is an amenable number.

438032981 is a deficient number, since it is larger than the sum of its proper divisors (1).

438032981 is an equidigital number, since it uses as much as digits as its factorization.

438032981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 438032981 is about 20929.2374681927. The cubic root of 438032981 is about 759.4553929598.

The spelling of 438032981 in words is "four hundred thirty-eight million, thirty-two thousand, nine hundred eighty-one".