39542479 has 4 divisors (see below), whose sum is σ = 39586984. Its totient is φ = 39497976.

The previous prime is 39542467. The next prime is 39542483. The reversal of 39542479 is 97424593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39542479 - 2⁷ = 39542351 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 (39542179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20892 + ... + 22705.

It is an arithmetic number, because the mean of its divisors is an integer number (9896746).

Almost surely, 2^39542479 is an apocalyptic number.

39542479 is a deficient number, since it is larger than the sum of its proper divisors (44505).

39542479 is an equidigital number, since it uses as much as digits as its factorization.

39542479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44504.

The product of its digits is 272160, while the sum is 43.

The square root of 39542479 is about 6288.2810846844. The cubic root of 39542479 is about 340.6862695834.

The spelling of 39542479 in words is "thirty-nine million, five hundred forty-two thousand, four hundred seventy-nine".