47769421 has 4 divisors (see below), whose sum is σ = 54593632. Its totient is φ = 40945212.

The previous prime is 47769391. The next prime is 47769433. The reversal of 47769421 is 12496774.

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 de Polignac number, because none of the positive numbers 2^k-47769421 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 (47769451) 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, 3412095 + ... + 3412108.

It is an arithmetic number, because the mean of its divisors is an integer number (13648408).

Almost surely, 2^47769421 is an apocalyptic number.

It is an amenable number.

47769421 is a deficient number, since it is larger than the sum of its proper divisors (6824211).

47769421 is an equidigital number, since it uses as much as digits as its factorization.

47769421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824210.

The product of its digits is 84672, while the sum is 40.

The square root of 47769421 is about 6911.5425919255. The cubic root of 47769421 is about 362.8412539137.

The spelling of 47769421 in words is "forty-seven million, seven hundred sixty-nine thousand, four hundred twenty-one".