47309261 has 2 divisors, whose sum is σ = 47309262. Its totient is φ = 47309260.

The previous prime is 47309243. The next prime is 47309293. The reversal of 47309261 is 16290374.

It is an a-pointer prime, because the next prime (47309293) can be obtained adding 47309261 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39300361 + 8008900 = 6269^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 47309261 - 2²² = 43114957 is a prime.

It is a super-2 number, since 2×47309261² = 4476332352732242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47303261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23654630 + 23654631.

It is an arithmetic number, because the mean of its divisors is an integer number (23654631).

Almost surely, 2^47309261 is an apocalyptic number.

It is an amenable number.

47309261 is a deficient number, since it is larger than the sum of its proper divisors (1).

47309261 is an equidigital number, since it uses as much as digits as its factorization.

47309261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 47309261 is about 6878.1727951542. The cubic root of 47309261 is about 361.6724166325.

The spelling of 47309261 in words is "forty-seven million, three hundred nine thousand, two hundred sixty-one".