39953497 has 2 divisors, whose sum is σ = 39953498. Its totient is φ = 39953496.

The previous prime is 39953491. The next prime is 39953527. The reversal of 39953497 is 79435993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37810201 + 2143296 = 6149^2 + 1464^2 .

It is a cyclic number.

It is not a de Polignac number, because 39953497 - 2¹¹ = 39951449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39953497.

It is not a weakly prime, because it can be changed into another prime (39953491) 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, 19976748 + 19976749.

It is an arithmetic number, because the mean of its divisors is an integer number (19976749).

Almost surely, 2^39953497 is an apocalyptic number.

It is an amenable number.

39953497 is a deficient number, since it is larger than the sum of its proper divisors (1).

39953497 is an equidigital number, since it uses as much as digits as its factorization.

39953497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 49.

The square root of 39953497 is about 6320.8778662461. The cubic root of 39953497 is about 341.8626062571.

The spelling of 39953497 in words is "thirty-nine million, nine hundred fifty-three thousand, four hundred ninety-seven".