39399799 has 2 divisors, whose sum is σ = 39399800. Its totient is φ = 39399798.

The previous prime is 39399793. The next prime is 39399821. The reversal of 39399799 is 99799393.

It is a weak prime.

It is an emirp because it is prime and its reverse (99799393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39399799 - 2¹¹ = 39397751 is a prime.

It is a super-2 number, since 2×39399799² = 3104688322480802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39399793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19699899 + 19699900.

It is an arithmetic number, because the mean of its divisors is an integer number (19699900).

Almost surely, 2^39399799 is an apocalyptic number.

39399799 is a deficient number, since it is larger than the sum of its proper divisors (1).

39399799 is an equidigital number, since it uses as much as digits as its factorization.

39399799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3720087, while the sum is 58.

The square root of 39399799 is about 6276.9259195883. The cubic root of 39399799 is about 340.2760128956.

The spelling of 39399799 in words is "thirty-nine million, three hundred ninety-nine thousand, seven hundred ninety-nine".