11409631 has 4 divisors (see below), whose sum is σ = 11579992. Its totient is φ = 11239272.

The previous prime is 11409617. The next prime is 11409637. The reversal of 11409631 is 13690411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13690411 = 7 ⋅1955773.

It is a cyclic number.

It is not a de Polignac number, because 11409631 - 2⁵ = 11409599 is a prime.

It is a super-2 number, since 2×11409631² = 260359359112322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11409596 and 11409605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409637) 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, 85080 + ... + 85213.

It is an arithmetic number, because the mean of its divisors is an integer number (2894998).

Almost surely, 2^11409631 is an apocalyptic number.

11409631 is a deficient number, since it is larger than the sum of its proper divisors (170361).

11409631 is an equidigital number, since it uses as much as digits as its factorization.

11409631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170360.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 11409631 is about 3377.8145301363. The cubic root of 11409631 is about 225.1250728485.

The spelling of 11409631 in words is "eleven million, four hundred nine thousand, six hundred thirty-one".