47780929 has 8 divisors (see below), whose sum is σ = 55721600. Its totient is φ = 40954788.

The previous prime is 47780917. The next prime is 47780933. The reversal of 47780929 is 92908774.

It is not a de Polignac number, because 47780929 - 2⁹ = 47780417 is a prime.

It is a super-2 number, since 2×47780929² = 4566034352206082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47780969) 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, 69309 + ... + 69994.

It is an arithmetic number, because the mean of its divisors is an integer number (6965200).

Almost surely, 2^47780929 is an apocalyptic number.

47780929 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

47780929 is a deficient number, since it is larger than the sum of its proper divisors (7940671).

47780929 is an equidigital number, since it uses as much as digits as its factorization.

47780929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139324 (or 139310 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 47780929 is about 6912.3750621621. The cubic root of 47780929 is about 362.8703886042.

It can be divided in two parts, 477 and 80929, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 47780929 in words is "forty-seven million, seven hundred eighty thousand, nine hundred twenty-nine".