39542993 has 4 divisors (see below), whose sum is σ = 45192000. Its totient is φ = 33893988.

The previous prime is 39542989. The next prime is 39542999. The reversal of 39542993 is 39924593.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39924593 = 101 ⋅395293.

It is a cyclic number.

It is not a de Polignac number, because 39542993 - 2² = 39542989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39542999) 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, 2824493 + ... + 2824506.

It is an arithmetic number, because the mean of its divisors is an integer number (11298000).

Almost surely, 2^39542993 is an apocalyptic number.

It is an amenable number.

39542993 is a deficient number, since it is larger than the sum of its proper divisors (5649007).

39542993 is an equidigital number, since it uses as much as digits as its factorization.

39542993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649006.

The product of its digits is 262440, while the sum is 44.

The square root of 39542993 is about 6288.3219542259. The cubic root of 39542993 is about 340.6877457342.

The spelling of 39542993 in words is "thirty-nine million, five hundred forty-two thousand, nine hundred ninety-three".