13797521 has 2 divisors, whose sum is σ = 13797522. Its totient is φ = 13797520.

The previous prime is 13797481. The next prime is 13797527. The reversal of 13797521 is 12579731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 1860496 = 3455^2 + 1364^2 .

It is a cyclic number.

It is not a de Polignac number, because 13797521 - 2⁶ = 13797457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13797527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6898760 + 6898761.

It is an arithmetic number, because the mean of its divisors is an integer number (6898761).

Almost surely, 2^13797521 is an apocalyptic number.

It is an amenable number.

13797521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13797521 is an equidigital number, since it uses as much as digits as its factorization.

13797521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 35.

The square root of 13797521 is about 3714.5014470316. The cubic root of 13797521 is about 239.8466671048.

The spelling of 13797521 in words is "thirteen million, seven hundred ninety-seven thousand, five hundred twenty-one".