31435109 has 2 divisors, whose sum is σ = 31435110. Its totient is φ = 31435108.

The previous prime is 31435087. The next prime is 31435111. The reversal of 31435109 is 90153413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28922884 + 2512225 = 5378^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 31435109 - 2¹² = 31431013 is a prime.

Together with 31435111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31435199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15717554 + 15717555.

It is an arithmetic number, because the mean of its divisors is an integer number (15717555).

Almost surely, 2^31435109 is an apocalyptic number.

It is an amenable number.

31435109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31435109 is an equidigital number, since it uses as much as digits as its factorization.

31435109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 31435109 is about 5606.7021501057. The cubic root of 31435109 is about 315.6009657744.

The spelling of 31435109 in words is "thirty-one million, four hundred thirty-five thousand, one hundred nine".