47261209 has 2 divisors, whose sum is σ = 47261210. Its totient is φ = 47261208.

The previous prime is 47261147. The next prime is 47261237. The reversal of 47261209 is 90216274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42968025 + 4293184 = 6555^2 + 2072^2 .

It is a cyclic number.

It is not a de Polignac number, because 47261209 - 2¹¹ = 47259161 is a prime.

It is a super-2 number, since 2×47261209² = 4467243752283362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47261299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23630604 + 23630605.

It is an arithmetic number, because the mean of its divisors is an integer number (23630605).

Almost surely, 2^47261209 is an apocalyptic number.

It is an amenable number.

47261209 is a deficient number, since it is larger than the sum of its proper divisors (1).

47261209 is an equidigital number, since it uses as much as digits as its factorization.

47261209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 47261209 is about 6874.6788288618. The cubic root of 47261209 is about 361.5499249688.

The spelling of 47261209 in words is "forty-seven million, two hundred sixty-one thousand, two hundred nine".