47164261 has 2 divisors, whose sum is σ = 47164262. Its totient is φ = 47164260.

The previous prime is 47164259. The next prime is 47164303. The reversal of 47164261 is 16246174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30305025 + 16859236 = 5505^2 + 4106^2 .

It is a cyclic number.

It is not a de Polignac number, because 47164261 - 2¹ = 47164259 is a prime.

It is a super-2 number, since 2×47164261² = 4448935031352242, which contains 22 as substring.

Together with 47164259, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2840944 and since 47164261 and 2840944 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 (47164241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23582130 + 23582131.

It is an arithmetic number, because the mean of its divisors is an integer number (23582131).

Almost surely, 2^47164261 is an apocalyptic number.

It is an amenable number.

47164261 is a deficient number, since it is larger than the sum of its proper divisors (1).

47164261 is an equidigital number, since it uses as much as digits as its factorization.

47164261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 47164261 is about 6867.6241160972. The cubic root of 47164261 is about 361.3025371881.

The spelling of 47164261 in words is "forty-seven million, one hundred sixty-four thousand, two hundred sixty-one".