11505397 has 6 divisors (see below), whose sum is σ = 11608898. Its totient is φ = 11402784.

The previous prime is 11505383. The next prime is 11505401. The reversal of 11505397 is 79350511.

It can be written as a sum of positive squares in 3 ways, for example, as 155236 + 11350161 = 394^2 + 3369^2 .

It is not a de Polignac number, because 11505397 - 2¹⁹ = 10981109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18463 + ... + 19075.

Almost surely, 2^11505397 is an apocalyptic number.

It is an amenable number.

11505397 is a deficient number, since it is larger than the sum of its proper divisors (103501).

11505397 is an frugal number, since it uses more digits than its factorization.

11505397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 11505397 is about 3391.9606424603. The cubic root of 11505397 is about 225.7531763776.

The spelling of 11505397 in words is "eleven million, five hundred five thousand, three hundred ninety-seven".