39799019 has 4 divisors (see below), whose sum is σ = 42860496. Its totient is φ = 36737544.

The previous prime is 39799007. The next prime is 39799021. The reversal of 39799019 is 91099793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91099793 = 31 ⋅2938703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39799019 is a prime.

It is a super-2 number, since 2×39799019² = 3167923826724722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39799519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530719 + ... + 1530744.

It is an arithmetic number, because the mean of its divisors is an integer number (10715124).

Almost surely, 2^39799019 is an apocalyptic number.

39799019 is a deficient number, since it is larger than the sum of its proper divisors (3061477).

39799019 is a wasteful number, since it uses less digits than its factorization.

39799019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061476.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 39799019 is about 6308.6463682790. The cubic root of 39799019 is about 341.4214395267.

The spelling of 39799019 in words is "thirty-nine million, seven hundred ninety-nine thousand, nineteen".