47454109 has 2 divisors, whose sum is σ = 47454110. Its totient is φ = 47454108.

The previous prime is 47454107. The next prime is 47454119. The reversal of 47454109 is 90145474.

47454109 is nontrivially palindromic in base 15.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45522009 + 1932100 = 6747^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 47454109 - 2¹ = 47454107 is a prime.

Together with 47454107, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_2857327 and since 47454109 and 2857327 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47454101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23727054 + 23727055.

It is an arithmetic number, because the mean of its divisors is an integer number (23727055).

Almost surely, 2^47454109 is an apocalyptic number.

It is an amenable number.

47454109 is a deficient number, since it is larger than the sum of its proper divisors (1).

47454109 is an equidigital number, since it uses as much as digits as its factorization.

47454109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 47454109 is about 6888.6942884701. The cubic root of 47454109 is about 362.0411545246.

The spelling of 47454109 in words is "forty-seven million, four hundred fifty-four thousand, one hundred nine".