11557397 has 2 divisors, whose sum is σ = 11557398. Its totient is φ = 11557396.

The previous prime is 11557373. The next prime is 11557423. The reversal of 11557397 is 79375511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8491396 + 3066001 = 2914^2 + 1751^2 .

It is a cyclic number.

It is not a de Polignac number, because 11557397 - 2¹² = 11553301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11557397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11557697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778698 + 5778699.

It is an arithmetic number, because the mean of its divisors is an integer number (5778699).

Almost surely, 2^11557397 is an apocalyptic number.

It is an amenable number.

11557397 is a deficient number, since it is larger than the sum of its proper divisors (1).

11557397 is an equidigital number, since it uses as much as digits as its factorization.

11557397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33075, while the sum is 38.

The square root of 11557397 is about 3399.6171843312. The cubic root of 11557397 is about 226.0927713211.

The spelling of 11557397 in words is "eleven million, five hundred fifty-seven thousand, three hundred ninety-seven".