438997553 has 2 divisors, whose sum is σ = 438997554. Its totient is φ = 438997552.

The previous prime is 438997523. The next prime is 438997597. The reversal of 438997553 is 355799834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382867489 + 56130064 = 19567^2 + 7492^2 .

It is a cyclic number.

It is not a de Polignac number, because 438997553 - 2¹⁶ = 438932017 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 438997495 and 438997504.

It is not a weakly prime, because it can be changed into another prime (438997513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219498776 + 219498777.

It is an arithmetic number, because the mean of its divisors is an integer number (219498777).

Almost surely, 2^438997553 is an apocalyptic number.

It is an amenable number.

438997553 is a deficient number, since it is larger than the sum of its proper divisors (1).

438997553 is an equidigital number, since it uses as much as digits as its factorization.

438997553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 53.

The square root of 438997553 is about 20952.2684452066. The cubic root of 438997553 is about 760.0124380467.

The spelling of 438997553 in words is "four hundred thirty-eight million, nine hundred ninety-seven thousand, five hundred fifty-three".