445938553 has 2 divisors, whose sum is σ = 445938554. Its totient is φ = 445938552.

The previous prime is 445938401. The next prime is 445938599. The reversal of 445938553 is 355839544.

It is an a-pointer prime, because the next prime (445938599) can be obtained adding 445938553 to its sum of digits (46).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429194089 + 16744464 = 20717^2 + 4092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445938553 is a prime.

It is a super-2 number, since 2×445938553² = 397722386103467618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445938253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222969276 + 222969277.

It is an arithmetic number, because the mean of its divisors is an integer number (222969277).

Almost surely, 2^445938553 is an apocalyptic number.

It is an amenable number.

445938553 is a deficient number, since it is larger than the sum of its proper divisors (1).

445938553 is an equidigital number, since it uses as much as digits as its factorization.

445938553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 46.

The square root of 445938553 is about 21117.2572319418. The cubic root of 445938553 is about 763.9970355458.

Subtracting from 445938553 its reverse (355839544), we obtain a palindrome (90099009).

The spelling of 445938553 in words is "four hundred forty-five million, nine hundred thirty-eight thousand, five hundred fifty-three".