47121413 has 2 divisors, whose sum is σ = 47121414. Its totient is φ = 47121412.

The previous prime is 47121407. The next prime is 47121469. The reversal of 47121413 is 31412174.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 21548164 = 5057^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 47121413 - 2⁴ = 47121397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47121713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23560706 + 23560707.

It is an arithmetic number, because the mean of its divisors is an integer number (23560707).

Almost surely, 2^47121413 is an apocalyptic number.

It is an amenable number.

47121413 is a deficient number, since it is larger than the sum of its proper divisors (1).

47121413 is an equidigital number, since it uses as much as digits as its factorization.

47121413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 47121413 is about 6864.5038422307. The cubic root of 47121413 is about 361.1930914534.

Adding to 47121413 its reverse (31412174), we get a palindrome (78533587).

The spelling of 47121413 in words is "forty-seven million, one hundred twenty-one thousand, four hundred thirteen".