31438713 has 4 divisors (see below), whose sum is σ = 41918288. Its totient is φ = 20959140.

The previous prime is 31438709. The next prime is 31438717. The reversal of 31438713 is 31783413.

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.

It is an interprime number because it is at equal distance from previous prime (31438709) and next prime (31438717).

It is not a de Polignac number, because 31438713 - 2² = 31438709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31438717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5239783 + ... + 5239788.

It is an arithmetic number, because the mean of its divisors is an integer number (10479572).

Almost surely, 2^31438713 is an apocalyptic number.

It is an amenable number.

31438713 is a deficient number, since it is larger than the sum of its proper divisors (10479575).

31438713 is a wasteful number, since it uses less digits than its factorization.

31438713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10479574.

The product of its digits is 6048, while the sum is 30.

The square root of 31438713 is about 5607.0235419516. The cubic root of 31438713 is about 315.6130264124.

The spelling of 31438713 in words is "thirty-one million, four hundred thirty-eight thousand, seven hundred thirteen".