47640549 has 8 divisors (see below), whose sum is σ = 69295392. Its totient is φ = 28873040.

The previous prime is 47640547. The next prime is 47640559. The reversal of 47640549 is 94504674.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47640549 - 2¹ = 47640547 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47640547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721794 + ... + 721859.

It is an arithmetic number, because the mean of its divisors is an integer number (8661924).

Almost surely, 2^47640549 is an apocalyptic number.

It is an amenable number.

47640549 is a deficient number, since it is larger than the sum of its proper divisors (21654843).

47640549 is a wasteful number, since it uses less digits than its factorization.

47640549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443667.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 47640549 is about 6902.2133406611. The cubic root of 47640549 is about 362.5146698780.

The spelling of 47640549 in words is "forty-seven million, six hundred forty thousand, five hundred forty-nine".