847672249 has 2 divisors, whose sum is σ = 847672250. Its totient is φ = 847672248.

The previous prime is 847672247. The next prime is 847672261. The reversal of 847672249 is 942276748.

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., 639735849 + 207936400 = 25293^2 + 14420^2 .

It is a cyclic number.

It is not a de Polignac number, because 847672249 - 2¹ = 847672247 is a prime.

It is a super-3 number, since 3×847672249³ (a number of 28 digits) contains 333 as substring.

Together with 847672247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (847672247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423836124 + 423836125.

It is an arithmetic number, because the mean of its divisors is an integer number (423836125).

Almost surely, 2^847672249 is an apocalyptic number.

It is an amenable number.

847672249 is a deficient number, since it is larger than the sum of its proper divisors (1).

847672249 is an equidigital number, since it uses as much as digits as its factorization.

847672249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 847672249 is about 29114.8115054863. The cubic root of 847672249 is about 946.4027389591.

The spelling of 847672249 in words is "eight hundred forty-seven million, six hundred seventy-two thousand, two hundred forty-nine".