39397994 has 4 divisors (see below), whose sum is σ = 59096994. Its totient is φ = 19698996.

The previous prime is 39397991. The next prime is 39397997. The reversal of 39397994 is 49979393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49979393 = 269 ⋅185797.

It is an interprime number because it is at equal distance from previous prime (39397991) and next prime (39397997).

It can be written as a sum of positive squares in only one way, i.e., 33814225 + 5583769 = 5815^2 + 2363^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39397991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9849497 + ... + 9849500.

Almost surely, 2^39397994 is an apocalyptic number.

39397994 is a deficient number, since it is larger than the sum of its proper divisors (19699000).

39397994 is a wasteful number, since it uses less digits than its factorization.

39397994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19698999.

The product of its digits is 1653372, while the sum is 53.

The square root of 39397994 is about 6276.7821373694. The cubic root of 39397994 is about 340.2708165274.

The spelling of 39397994 in words is "thirty-nine million, three hundred ninety-seven thousand, nine hundred ninety-four".