31348613 has 4 divisors (see below), whose sum is σ = 32998560. Its totient is φ = 29698668.

The previous prime is 31348607. The next prime is 31348619. The reversal of 31348613 is 31684313.

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 an emirpimes, since its reverse is a distinct semiprime: 31684313 = 331 ⋅95723.

It is an interprime number because it is at equal distance from previous prime (31348607) and next prime (31348619).

It is a cyclic number.

It is not a de Polignac number, because 31348613 - 2⁶ = 31348549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31348619) 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, 824945 + ... + 824982.

It is an arithmetic number, because the mean of its divisors is an integer number (8249640).

Almost surely, 2^31348613 is an apocalyptic number.

It is an amenable number.

31348613 is a deficient number, since it is larger than the sum of its proper divisors (1649947).

31348613 is a wasteful number, since it uses less digits than its factorization.

31348613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649946.

The product of its digits is 5184, while the sum is 29.

The square root of 31348613 is about 5598.9832112626. The cubic root of 31348613 is about 315.3112334970.

The spelling of 31348613 in words is "thirty-one million, three hundred forty-eight thousand, six hundred thirteen".