47135861 has 2 divisors, whose sum is σ = 47135862. Its totient is φ = 47135860.

The previous prime is 47135831. The next prime is 47135863. The reversal of 47135861 is 16853174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36120100 + 11015761 = 6010^2 + 3319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47135861 is a prime.

It is a super-2 number, since 2×47135861² = 4443578784422642, which contains 22 as substring.

Together with 47135863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47135863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23567930 + 23567931.

It is an arithmetic number, because the mean of its divisors is an integer number (23567931).

Almost surely, 2^47135861 is an apocalyptic number.

It is an amenable number.

47135861 is a deficient number, since it is larger than the sum of its proper divisors (1).

47135861 is an equidigital number, since it uses as much as digits as its factorization.

47135861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 47135861 is about 6865.5561318804. The cubic root of 47135861 is about 361.2300030837.

The spelling of 47135861 in words is "forty-seven million, one hundred thirty-five thousand, eight hundred sixty-one".