31193093 has 2 divisors, whose sum is σ = 31193094. Its totient is φ = 31193092.

The previous prime is 31193081. The next prime is 31193131. The reversal of 31193093 is 39039113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30448324 + 744769 = 5518^2 + 863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31193093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31193023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15596546 + 15596547.

It is an arithmetic number, because the mean of its divisors is an integer number (15596547).

Almost surely, 2^31193093 is an apocalyptic number.

It is an amenable number.

31193093 is a deficient number, since it is larger than the sum of its proper divisors (1).

31193093 is an equidigital number, since it uses as much as digits as its factorization.

31193093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 31193093 is about 5585.0777076062. The cubic root of 31193093 is about 314.7889507598.

The spelling of 31193093 in words is "thirty-one million, one hundred ninety-three thousand, ninety-three".