11551897 has 8 divisors (see below), whose sum is σ = 13472000. Its totient is φ = 9901332.

The previous prime is 11551879. The next prime is 11551909. The reversal of 11551897 is 79815511.

It is not a de Polignac number, because 11551897 - 2⁷ = 11551769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11551847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16497 + ... + 17182.

It is an arithmetic number, because the mean of its divisors is an integer number (1684000).

Almost surely, 2^11551897 is an apocalyptic number.

It is an amenable number.

11551897 is a deficient number, since it is larger than the sum of its proper divisors (1920103).

11551897 is an frugal number, since it uses more digits than its factorization.

11551897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33700 (or 33686 counting only the distinct ones).

The product of its digits is 12600, while the sum is 37.

The square root of 11551897 is about 3398.8081734632. The cubic root of 11551897 is about 226.0569008579.

The spelling of 11551897 in words is "eleven million, five hundred fifty-one thousand, eight hundred ninety-seven".