47491117 has 2 divisors, whose sum is σ = 47491118. Its totient is φ = 47491116.

The previous prime is 47491111. The next prime is 47491121. The reversal of 47491117 is 71119474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29800681 + 17690436 = 5459^2 + 4206^2 .

It is a cyclic number.

It is not a de Polignac number, because 47491117 - 2²³ = 39102509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47491111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23745558 + 23745559.

It is an arithmetic number, because the mean of its divisors is an integer number (23745559).

Almost surely, 2^47491117 is an apocalyptic number.

It is an amenable number.

47491117 is a deficient number, since it is larger than the sum of its proper divisors (1).

47491117 is an equidigital number, since it uses as much as digits as its factorization.

47491117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 34.

The square root of 47491117 is about 6891.3799053600. The cubic root of 47491117 is about 362.1352449897.

The spelling of 47491117 in words is "forty-seven million, four hundred ninety-one thousand, one hundred seventeen".