438087649 has 2 divisors, whose sum is σ = 438087650. Its totient is φ = 438087648.

The previous prime is 438087641. The next prime is 438087667. The reversal of 438087649 is 946780834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368064225 + 70023424 = 19185^2 + 8368^2 .

It is a cyclic number.

It is not a de Polignac number, because 438087649 - 2³ = 438087641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438087641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219043824 + 219043825.

It is an arithmetic number, because the mean of its divisors is an integer number (219043825).

Almost surely, 2^438087649 is an apocalyptic number.

It is an amenable number.

438087649 is a deficient number, since it is larger than the sum of its proper divisors (1).

438087649 is an equidigital number, since it uses as much as digits as its factorization.

438087649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 438087649 is about 20930.5434473164. The cubic root of 438087649 is about 759.4869858475.

It can be divided in two parts, 4380 and 87649, that added together give a palindrome (92029).

The spelling of 438087649 in words is "four hundred thirty-eight million, eighty-seven thousand, six hundred forty-nine".