1003521397 has 2 divisors, whose sum is σ = 1003521398. Its totient is φ = 1003521396.

The previous prime is 1003521391. The next prime is 1003521419. The reversal of 1003521397 is 7931253001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555733476 + 447787921 = 23574^2 + 21161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003521397 - 2⁷ = 1003521269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003521391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501760698 + 501760699.

It is an arithmetic number, because the mean of its divisors is an integer number (501760699).

Almost surely, 2^1003521397 is an apocalyptic number.

It is an amenable number.

1003521397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003521397 is an equidigital number, since it uses as much as digits as its factorization.

1003521397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 1003521397 is about 31678.4058468857. The cubic root of 1003521397 is about 1001.1724238850.

Adding to 1003521397 its reverse (7931253001), we get a palindrome (8934774398).

The spelling of 1003521397 in words is "one billion, three million, five hundred twenty-one thousand, three hundred ninety-seven".