47742517 has 4 divisors (see below), whose sum is σ = 47789856. Its totient is φ = 47695180.

The previous prime is 47742509. The next prime is 47742521. The reversal of 47742517 is 71524774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47742517 - 2³ = 47742509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47742577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22123 + ... + 24184.

It is an arithmetic number, because the mean of its divisors is an integer number (11947464).

Almost surely, 2^47742517 is an apocalyptic number.

It is an amenable number.

47742517 is a deficient number, since it is larger than the sum of its proper divisors (47339).

47742517 is a wasteful number, since it uses less digits than its factorization.

47742517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47338.

The product of its digits is 54880, while the sum is 37.

The square root of 47742517 is about 6909.5960084509. The cubic root of 47742517 is about 362.7731230599.

The spelling of 47742517 in words is "forty-seven million, seven hundred forty-two thousand, five hundred seventeen".