39998743 has 16 divisors (see below), whose sum is σ = 43884000. Its totient is φ = 36312192.

The previous prime is 39998741. The next prime is 39998753. The reversal of 39998743 is 34789993.

It is not a de Polignac number, because 39998743 - 2¹ = 39998741 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 (39998741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126021 + ... + 126337.

It is an arithmetic number, because the mean of its divisors is an integer number (2742750).

Almost surely, 2^39998743 is an apocalyptic number.

39998743 is a deficient number, since it is larger than the sum of its proper divisors (3885257).

39998743 is a wasteful number, since it uses less digits than its factorization.

39998743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594.

The product of its digits is 1469664, while the sum is 52.

The square root of 39998743 is about 6324.4559449806. The cubic root of 39998743 is about 341.9916068982.

The spelling of 39998743 in words is "thirty-nine million, nine hundred ninety-eight thousand, seven hundred forty-three".