39540549 has 4 divisors (see below), whose sum is σ = 52720736. Its totient is φ = 26360364.

The previous prime is 39540541. The next prime is 39540551. The reversal of 39540549 is 94504593.

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: 94504593 = 3 ⋅31501531.

It is not a de Polignac number, because 39540549 - 2³ = 39540541 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 (39540541) 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, 6590089 + ... + 6590094.

It is an arithmetic number, because the mean of its divisors is an integer number (13180184).

Almost surely, 2^39540549 is an apocalyptic number.

It is an amenable number.

39540549 is a deficient number, since it is larger than the sum of its proper divisors (13180187).

39540549 is a wasteful number, since it uses less digits than its factorization.

39540549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180186.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 39540549 is about 6288.1276227507. The cubic root of 39540549 is about 340.6807267241.

The spelling of 39540549 in words is "thirty-nine million, five hundred forty thousand, five hundred forty-nine".