31617049 has 2 divisors, whose sum is σ = 31617050. Its totient is φ = 31617048.

The previous prime is 31617029. The next prime is 31617073. The reversal of 31617049 is 94071613.

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., 31360000 + 257049 = 5600^2 + 507^2 .

It is an emirp because it is prime and its reverse (94071613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31617049 - 2¹⁵ = 31584281 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31617049.

It is not a weakly prime, because it can be changed into another prime (31617029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15808524 + 15808525.

It is an arithmetic number, because the mean of its divisors is an integer number (15808525).

Almost surely, 2^31617049 is an apocalyptic number.

It is an amenable number.

31617049 is a deficient number, since it is larger than the sum of its proper divisors (1).

31617049 is an equidigital number, since it uses as much as digits as its factorization.

31617049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 31617049 is about 5622.9039650344. The cubic root of 31617049 is about 316.2086728584.

The spelling of 31617049 in words is "thirty-one million, six hundred seventeen thousand, forty-nine".