31098061 has 2 divisors, whose sum is σ = 31098062. Its totient is φ = 31098060.

The previous prime is 31098059. The next prime is 31098077. The reversal of 31098061 is 16089013.

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., 29909961 + 1188100 = 5469^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 31098061 - 2¹ = 31098059 is a prime.

Together with 31098059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31098031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15549030 + 15549031.

It is an arithmetic number, because the mean of its divisors is an integer number (15549031).

Almost surely, 2^31098061 is an apocalyptic number.

It is an amenable number.

31098061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31098061 is an equidigital number, since it uses as much as digits as its factorization.

31098061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 31098061 is about 5576.5635475622. The cubic root of 31098061 is about 314.4689498489.

The spelling of 31098061 in words is "thirty-one million, ninety-eight thousand, sixty-one".