11649531 has 4 divisors (see below), whose sum is σ = 15532712. Its totient is φ = 7766352.

The previous prime is 11649529. The next prime is 11649551. The reversal of 11649531 is 13594611.

11649531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11649531 - 2¹ = 11649529 is a prime.

It is a super-2 number, since 2×11649531² = 271423145039922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11649511) 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, 1941586 + ... + 1941591.

It is an arithmetic number, because the mean of its divisors is an integer number (3883178).

Almost surely, 2^11649531 is an apocalyptic number.

11649531 is a deficient number, since it is larger than the sum of its proper divisors (3883181).

11649531 is an equidigital number, since it uses as much as digits as its factorization.

11649531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883180.

The product of its digits is 3240, while the sum is 30.

The square root of 11649531 is about 3413.1409288220. The cubic root of 11649531 is about 226.6919754996.

The spelling of 11649531 in words is "eleven million, six hundred forty-nine thousand, five hundred thirty-one".