39742999 has 4 divisors (see below), whose sum is σ = 40056064. Its totient is φ = 39429936.

The previous prime is 39742949. The next prime is 39743017. The reversal of 39742999 is 99924793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99924793 = 17 ⋅5877929.

It is a cyclic number.

It is not a de Polignac number, because 39742999 - 2¹⁷ = 39611927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39742949) 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, 156342 + ... + 156595.

It is an arithmetic number, because the mean of its divisors is an integer number (10014016).

Almost surely, 2^39742999 is an apocalyptic number.

39742999 is a deficient number, since it is larger than the sum of its proper divisors (313065).

39742999 is a wasteful number, since it uses less digits than its factorization.

39742999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313064.

The product of its digits is 1102248, while the sum is 52.

The square root of 39742999 is about 6304.2048665950. The cubic root of 39742999 is about 341.2611725110.

The spelling of 39742999 in words is "thirty-nine million, seven hundred forty-two thousand, nine hundred ninety-nine".