31000049 has 4 divisors (see below), whose sum is σ = 31012080. Its totient is φ = 30988020.

The previous prime is 31000003. The next prime is 31000063. The reversal of 31000049 is 94000013.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31000049 - 2¹² = 30995953 is a prime.

It is a super-2 number, since 2×31000049² = 1922006076004802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31000349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (7753020).

Almost surely, 2^31000049 is an apocalyptic number.

It is an amenable number.

31000049 is a deficient number, since it is larger than the sum of its proper divisors (12031).

31000049 is an equidigital number, since it uses as much as digits as its factorization.

31000049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 31000049 is about 5567.7687631582. The cubic root of 31000049 is about 314.1382307527.

It can be divided in two parts, 3100004 and 9, that added together give a palindrome (3100013).

The spelling of 31000049 in words is "thirty-one million, forty-nine", and thus it is an aban number and an uban number.