47929909 has 4 divisors (see below), whose sum is σ = 48112416. Its totient is φ = 47747404.

The previous prime is 47929891. The next prime is 47929933. The reversal of 47929909 is 90992974.

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 47929909 - 2⁵ = 47929877 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 (47929949) 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, 90859 + ... + 91384.

It is an arithmetic number, because the mean of its divisors is an integer number (12028104).

Almost surely, 2^47929909 is an apocalyptic number.

It is an amenable number.

47929909 is a deficient number, since it is larger than the sum of its proper divisors (182507).

47929909 is a wasteful number, since it uses less digits than its factorization.

47929909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182506.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 47929909 is about 6923.1430001120. The cubic root of 47929909 is about 363.2471382286.

The spelling of 47929909 in words is "forty-seven million, nine hundred twenty-nine thousand, nine hundred nine".