31359893 has 2 divisors, whose sum is σ = 31359894. Its totient is φ = 31359892.

The previous prime is 31359871. The next prime is 31359901. The reversal of 31359893 is 39895313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27646564 + 3713329 = 5258^2 + 1927^2 .

It is an emirp because it is prime and its reverse (39895313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31359893 - 2¹⁴ = 31343509 is a prime.

It is equal to p_1936796 and since 31359893 and 1936796 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31359893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31359803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15679946 + 15679947.

It is an arithmetic number, because the mean of its divisors is an integer number (15679947).

Almost surely, 2^31359893 is an apocalyptic number.

It is an amenable number.

31359893 is a deficient number, since it is larger than the sum of its proper divisors (1).

31359893 is an equidigital number, since it uses as much as digits as its factorization.

31359893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 31359893 is about 5599.9904464204. The cubic root of 31359893 is about 315.3490478675.

It can be divided in two parts, 313 and 59893, that added together give a palindrome (60206).

The spelling of 31359893 in words is "thirty-one million, three hundred fifty-nine thousand, eight hundred ninety-three".