47749021 has 8 divisors (see below), whose sum is σ = 49653504. Its totient is φ = 45867360.

The previous prime is 47749001. The next prime is 47749027. The reversal of 47749021 is 12094774.

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 47749021 - 2⁷ = 47748893 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 (47749027) 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, 1375 + ... + 9868.

It is an arithmetic number, because the mean of its divisors is an integer number (6206688).

Almost surely, 2^47749021 is an apocalyptic number.

It is an amenable number.

47749021 is a deficient number, since it is larger than the sum of its proper divisors (1904483).

47749021 is a wasteful number, since it uses less digits than its factorization.

47749021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11411.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 47749021 is about 6910.0666422257. The cubic root of 47749021 is about 362.7895959328.

The spelling of 47749021 in words is "forty-seven million, seven hundred forty-nine thousand, twenty-one".