47123505 has 64 divisors (see below), whose sum is σ = 98461440. Its totient is φ = 21081600.

The previous prime is 47123497. The next prime is 47123509. The reversal of 47123505 is 50532174.

It is a happy number.

It is not a de Polignac number, because 47123505 - 2³ = 47123497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (47123509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18085 + ... + 20525.

It is an arithmetic number, because the mean of its divisors is an integer number (1538460).

Almost surely, 2^47123505 is an apocalyptic number.

47123505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47123505 is an abundant number, since it is smaller than the sum of its proper divisors (51337935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47123505 is a wasteful number, since it uses less digits than its factorization.

47123505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2473 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 47123505 is about 6864.6562186318. The cubic root of 47123505 is about 361.1984365447.

Adding to 47123505 its reverse (50532174), we get a palindrome (97655679).

The spelling of 47123505 in words is "forty-seven million, one hundred twenty-three thousand, five hundred five".