39999983 has 2 divisors, whose sum is σ = 39999984. Its totient is φ = 39999982.

The previous prime is 39999979. The next prime is 40000003. The reversal of 39999983 is 38999993.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (38999993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39999983 - 2² = 39999979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39999913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19999991 + 19999992.

It is an arithmetic number, because the mean of its divisors is an integer number (19999992).

Almost surely, 2^39999983 is an apocalyptic number.

39999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

39999983 is an equidigital number, since it uses as much as digits as its factorization.

39999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4251528, while the sum is 59.

The square root of 39999983 is about 6324.5539763686. The cubic root of 39999983 is about 341.9951408860.

The spelling of 39999983 in words is "thirty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-three".