1549953539 has 4 divisors (see below), whose sum is σ = 1563670056. Its totient is φ = 1536237024.

The previous prime is 1549953511. The next prime is 1549953547. The reversal of 1549953539 is 9353599451.

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 1549953539 - 2¹⁶ = 1549888003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1549953599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6858089 + ... + 6858314.

It is an arithmetic number, because the mean of its divisors is an integer number (390917514).

Almost surely, 2^1549953539 is an apocalyptic number.

1549953539 is a deficient number, since it is larger than the sum of its proper divisors (13716517).

1549953539 is a wasteful number, since it uses less digits than its factorization.

1549953539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13716516.

The product of its digits is 3280500, while the sum is 53.

The square root of 1549953539 is about 39369.4493103472. The cubic root of 1549953539 is about 1157.2829639085.

The spelling of 1549953539 in words is "one billion, five hundred forty-nine million, nine hundred fifty-three thousand, five hundred thirty-nine".