31030093 has 2 divisors, whose sum is σ = 31030094. Its totient is φ = 31030092.

The previous prime is 31030091. The next prime is 31030123. The reversal of 31030093 is 39003013.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 94249 = 5562^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030093 - 2¹ = 31030091 is a prime.

Together with 31030091, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31030093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31030091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515046 + 15515047.

It is an arithmetic number, because the mean of its divisors is an integer number (15515047).

Almost surely, 2^31030093 is an apocalyptic number.

It is an amenable number.

31030093 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030093 is an equidigital number, since it uses as much as digits as its factorization.

31030093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 31030093 is about 5570.4661384843. The cubic root of 31030093 is about 314.2396813630.

It can be divided in two parts, 310 and 30093, that added together give a palindrome (30403).

The spelling of 31030093 in words is "thirty-one million, thirty thousand, ninety-three".