31363109 has 2 divisors, whose sum is σ = 31363110. Its totient is φ = 31363108.

The previous prime is 31363097. The next prime is 31363117. The reversal of 31363109 is 90136313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 13300609 = 4250^2 + 3647^2 .

It is a cyclic number.

It is not a de Polignac number, because 31363109 - 2⁸ = 31362853 is a prime.

It is a super-2 number, since 2×31363109² = 1967289212291762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31363009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15681554 + 15681555.

It is an arithmetic number, because the mean of its divisors is an integer number (15681555).

Almost surely, 2^31363109 is an apocalyptic number.

It is an amenable number.

31363109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31363109 is an equidigital number, since it uses as much as digits as its factorization.

31363109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 31363109 is about 5600.2775824061. The cubic root of 31363109 is about 315.3598273247.

The spelling of 31363109 in words is "thirty-one million, three hundred sixty-three thousand, one hundred nine".