47121539 has 4 divisors (see below), whose sum is σ = 49601640. Its totient is φ = 44641440.

The previous prime is 47121527. The next prime is 47121541. The reversal of 47121539 is 93512174.

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 47121539 - 2¹⁶ = 47056003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47120539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240022 + ... + 1240059.

It is an arithmetic number, because the mean of its divisors is an integer number (12400410).

Almost surely, 2^47121539 is an apocalyptic number.

47121539 is a deficient number, since it is larger than the sum of its proper divisors (2480101).

47121539 is a wasteful number, since it uses less digits than its factorization.

47121539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480100.

The product of its digits is 7560, while the sum is 32.

The square root of 47121539 is about 6864.5130198726. The cubic root of 47121539 is about 361.1934133898.

The spelling of 47121539 in words is "forty-seven million, one hundred twenty-one thousand, five hundred thirty-nine".