47749769 has 4 divisors (see below), whose sum is σ = 47780244. Its totient is φ = 47719296.

The previous prime is 47749711. The next prime is 47749777. The reversal of 47749769 is 96794774.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96794774 = 2 ⋅48397387.

It can be written as a sum of positive squares in 2 ways, for example, as 33408400 + 14341369 = 5780^2 + 3787^2 .

It is a cyclic number.

It is not a de Polignac number, because 47749769 - 2²⁴ = 30972553 is a prime.

It is a super-2 number, since 2×47749769² = 4560080879106722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47749769.

It is not an unprimeable number, because it can be changed into a prime (47742769) 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, 12752 + ... + 16065.

It is an arithmetic number, because the mean of its divisors is an integer number (11945061).

Almost surely, 2^47749769 is an apocalyptic number.

It is an amenable number.

47749769 is a deficient number, since it is larger than the sum of its proper divisors (30475).

47749769 is a wasteful number, since it uses less digits than its factorization.

47749769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30474.

The product of its digits is 2667168, while the sum is 53.

The square root of 47749769 is about 6910.1207659490. The cubic root of 47749769 is about 362.7914903186.

The spelling of 47749769 in words is "forty-seven million, seven hundred forty-nine thousand, seven hundred sixty-nine".