39945953 has 2 divisors, whose sum is σ = 39945954. Its totient is φ = 39945952.

The previous prime is 39945947. The next prime is 39945967. The reversal of 39945953 is 35954993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31225744 + 8720209 = 5588^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 39945953 - 2⁶ = 39945889 is a prime.

It is a super-2 number, since 2×39945953² = 3191358322156418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39945898 and 39945907.

It is not a weakly prime, because it can be changed into another prime (39945943) 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, 19972976 + 19972977.

It is an arithmetic number, because the mean of its divisors is an integer number (19972977).

Almost surely, 2^39945953 is an apocalyptic number.

It is an amenable number.

39945953 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945953 is an equidigital number, since it uses as much as digits as its factorization.

39945953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 656100, while the sum is 47.

The square root of 39945953 is about 6320.2810855214. The cubic root of 39945953 is about 341.8410881253.

The spelling of 39945953 in words is "thirty-nine million, nine hundred forty-five thousand, nine hundred fifty-three".