47639517 has 16 divisors (see below), whose sum is σ = 67008960. Its totient is φ = 30022272.

The previous prime is 47639483. The next prime is 47639531. The reversal of 47639517 is 71593674.

It is not a de Polignac number, because 47639517 - 2⁶ = 47639453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47639567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49513 + ... + 50465.

It is an arithmetic number, because the mean of its divisors is an integer number (4188060).

Almost surely, 2^47639517 is an apocalyptic number.

It is an amenable number.

47639517 is a deficient number, since it is larger than the sum of its proper divisors (19369443).

47639517 is a wasteful number, since it uses less digits than its factorization.

47639517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852.

The product of its digits is 158760, while the sum is 42.

The square root of 47639517 is about 6902.1385816282. The cubic root of 47639517 is about 362.5120522350.

It can be divided in two parts, 476 and 39517, that added together give a palindrome (39993).

The spelling of 47639517 in words is "forty-seven million, six hundred thirty-nine thousand, five hundred seventeen".