47539457 has 8 divisors (see below), whose sum is σ = 55440000. Its totient is φ = 40747812.

The previous prime is 47539447. The next prime is 47539477. The reversal of 47539457 is 75493574.

It is not a de Polignac number, because 47539457 - 2⁴ = 47539441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47539417) 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 7 ways as a sum of consecutive naturals, for example, 68957 + ... + 69642.

It is an arithmetic number, because the mean of its divisors is an integer number (6930000).

Almost surely, 2^47539457 is an apocalyptic number.

It is an amenable number.

47539457 is a deficient number, since it is larger than the sum of its proper divisors (7900543).

47539457 is an equidigital number, since it uses as much as digits as its factorization.

47539457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138620 (or 138606 counting only the distinct ones).

The product of its digits is 529200, while the sum is 44.

The square root of 47539457 is about 6894.8862934787. The cubic root of 47539457 is about 362.2580727428.

The spelling of 47539457 in words is "forty-seven million, five hundred thirty-nine thousand, four hundred fifty-seven".