31352939 has 2 divisors, whose sum is σ = 31352940. Its totient is φ = 31352938.

The previous prime is 31352929. The next prime is 31352953. The reversal of 31352939 is 93925313.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (93925313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31352939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31352899 and 31352908.

It is not a weakly prime, because it can be changed into another prime (31352929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15676469 + 15676470.

It is an arithmetic number, because the mean of its divisors is an integer number (15676470).

Almost surely, 2^31352939 is an apocalyptic number.

31352939 is a deficient number, since it is larger than the sum of its proper divisors (1).

31352939 is an equidigital number, since it uses as much as digits as its factorization.

31352939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 35.

The square root of 31352939 is about 5599.3695180797. The cubic root of 31352939 is about 315.3257367825.

The spelling of 31352939 in words is "thirty-one million, three hundred fifty-two thousand, nine hundred thirty-nine".