13049831 has 4 divisors (see below), whose sum is σ = 13061664. Its totient is φ = 13038000.

The previous prime is 13049821. The next prime is 13049833. The reversal of 13049831 is 13894031.

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 13049831 - 2¹⁰ = 13048807 is a prime.

It is a super-2 number, since 2×13049831² = 340596178257122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 13049794 and 13049803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13049833) 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, 4070 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (3265416).

Almost surely, 2^13049831 is an apocalyptic number.

13049831 is a deficient number, since it is larger than the sum of its proper divisors (11833).

13049831 is a wasteful number, since it uses less digits than its factorization.

13049831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11832.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 13049831 is about 3612.4549824185. The cubic root of 13049831 is about 235.4335199706.

The spelling of 13049831 in words is "thirteen million, forty-nine thousand, eight hundred thirty-one".