39986953 has 2 divisors, whose sum is σ = 39986954. Its totient is φ = 39986952.

The previous prime is 39986951. The next prime is 39986957. The reversal of 39986953 is 35968993.

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., 38340864 + 1646089 = 6192^2 + 1283^2 .

It is an emirp because it is prime and its reverse (35968993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39986953 - 2¹ = 39986951 is a prime.

Together with 39986951, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 39986953.

It is not a weakly prime, because it can be changed into another prime (39986951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19993476 + 19993477.

It is an arithmetic number, because the mean of its divisors is an integer number (19993477).

Almost surely, 2^39986953 is an apocalyptic number.

It is an amenable number.

39986953 is a deficient number, since it is larger than the sum of its proper divisors (1).

39986953 is an equidigital number, since it uses as much as digits as its factorization.

39986953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 52.

The square root of 39986953 is about 6323.5237802985. The cubic root of 39986953 is about 341.9580018649.

The spelling of 39986953 in words is "thirty-nine million, nine hundred eighty-six thousand, nine hundred fifty-three".