47809349 has 6 divisors (see below), whose sum is σ = 55615014. Its totient is φ = 40979400.

The previous prime is 47809343. The next prime is 47809357. The reversal of 47809349 is 94390874.

It can be written as a sum of positive squares in only one way, i.e., 47541025 + 268324 = 6895^2 + 518^2 .

It is a de Polignac number, because none of the positive numbers 2^k-47809349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47809343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 487802 + ... + 487899.

It is an arithmetic number, because the mean of its divisors is an integer number (9269169).

Almost surely, 2^47809349 is an apocalyptic number.

47809349 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

47809349 is a deficient number, since it is larger than the sum of its proper divisors (7805665).

47809349 is an equidigital number, since it uses as much as digits as its factorization.

47809349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975715 (or 975708 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 47809349 is about 6914.4304899247. The cubic root of 47809349 is about 362.9423192026.

The spelling of 47809349 in words is "forty-seven million, eight hundred nine thousand, three hundred forty-nine".