11649081 has 4 divisors (see below), whose sum is σ = 15532112. Its totient is φ = 7766052.

The previous prime is 11649073. The next prime is 11649083. The reversal of 11649081 is 18094611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11649081 - 2³ = 11649073 is a prime.

It is a super-2 number, since 2×11649081² = 271402176289122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11649083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941511 + ... + 1941516.

It is an arithmetic number, because the mean of its divisors is an integer number (3883028).

Almost surely, 2^11649081 is an apocalyptic number.

It is an amenable number.

11649081 is a deficient number, since it is larger than the sum of its proper divisors (3883031).

11649081 is an equidigital number, since it uses as much as digits as its factorization.

11649081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883030.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 11649081 is about 3413.0750065007. The cubic root of 11649081 is about 226.6890565637.

The spelling of 11649081 in words is "eleven million, six hundred forty-nine thousand, eighty-one".