49391213 has 2 divisors, whose sum is σ = 49391214. Its totient is φ = 49391212.

The previous prime is 49391207. The next prime is 49391231. The reversal of 49391213 is 31219394.

Together with next prime (49391231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36156169 + 13235044 = 6013^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 49391213 - 2⁴ = 49391197 is a prime.

It is a super-2 number, since 2×49391213² = 4878983843222738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49391213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49391233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24695606 + 24695607.

It is an arithmetic number, because the mean of its divisors is an integer number (24695607).

Almost surely, 2^49391213 is an apocalyptic number.

It is an amenable number.

49391213 is a deficient number, since it is larger than the sum of its proper divisors (1).

49391213 is an equidigital number, since it uses as much as digits as its factorization.

49391213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 32.

The square root of 49391213 is about 7027.8882318944. Note that the first 3 decimals coincide. The cubic root of 49391213 is about 366.9018464606.

The spelling of 49391213 in words is "forty-nine million, three hundred ninety-one thousand, two hundred thirteen".