49821397 has 2 divisors, whose sum is σ = 49821398. Its totient is φ = 49821396.

The previous prime is 49821379. The next prime is 49821419. The reversal of 49821397 is 79312894.

Together with previous prime (49821379) 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., 48986001 + 835396 = 6999^2 + 914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49821397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49821337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24910698 + 24910699.

It is an arithmetic number, because the mean of its divisors is an integer number (24910699).

Almost surely, 2^49821397 is an apocalyptic number.

It is an amenable number.

49821397 is a deficient number, since it is larger than the sum of its proper divisors (1).

49821397 is an equidigital number, since it uses as much as digits as its factorization.

49821397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 49821397 is about 7058.4273744227. The cubic root of 49821397 is about 367.9639738086.

The spelling of 49821397 in words is "forty-nine million, eight hundred twenty-one thousand, three hundred ninety-seven".