31359949 has 2 divisors, whose sum is σ = 31359950. Its totient is φ = 31359948.

The previous prime is 31359931. The next prime is 31359961. The reversal of 31359949 is 94995313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16957924 + 14402025 = 4118^2 + 3795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31359949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31359749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15679974 + 15679975.

It is an arithmetic number, because the mean of its divisors is an integer number (15679975).

Almost surely, 2^31359949 is an apocalyptic number.

It is an amenable number.

31359949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31359949 is an equidigital number, since it uses as much as digits as its factorization.

31359949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 43.

The square root of 31359949 is about 5599.9954464267. The cubic root of 31359949 is about 315.3492355758.

It can be divided in two parts, 313599 and 49, that multiplied together give a palindrome (15366351).

The spelling of 31359949 in words is "thirty-one million, three hundred fifty-nine thousand, nine hundred forty-nine".