11403631 has 4 divisors (see below), whose sum is σ = 11417512. Its totient is φ = 11389752.

The previous prime is 11403593. The next prime is 11403661. The reversal of 11403631 is 13630411.

11403631 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 11403631 - 2¹⁷ = 11272559 is a prime.

It is a super-2 number, since 2×11403631² = 260085599968322, 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 = 11403599 and 11403608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403661) 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, 5625 + ... + 7378.

It is an arithmetic number, because the mean of its divisors is an integer number (2854378).

Almost surely, 2^11403631 is an apocalyptic number.

11403631 is a deficient number, since it is larger than the sum of its proper divisors (13881).

11403631 is an equidigital number, since it uses as much as digits as its factorization.

11403631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13880.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 11403631 is about 3376.9262651115. The cubic root of 11403631 is about 225.0856036410.

The spelling of 11403631 in words is "eleven million, four hundred three thousand, six hundred thirty-one".