49697281 has 2 divisors, whose sum is σ = 49697282. Its totient is φ = 49697280.

The previous prime is 49697279. The next prime is 49697299. The reversal of 49697281 is 18279694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40449600 + 9247681 = 6360^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 49697281 - 2¹ = 49697279 is a prime.

It is a super-2 number, since 2×49697281² = 4939639477585922, which contains 22 as substring.

Together with 49697279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49692281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24848640 + 24848641.

It is an arithmetic number, because the mean of its divisors is an integer number (24848641).

Almost surely, 2^49697281 is an apocalyptic number.

It is an amenable number.

49697281 is a deficient number, since it is larger than the sum of its proper divisors (1).

49697281 is an equidigital number, since it uses as much as digits as its factorization.

49697281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 49697281 is about 7049.6298484389. The cubic root of 49697281 is about 367.6581601306.

The spelling of 49697281 in words is "forty-nine million, six hundred ninety-seven thousand, two hundred eighty-one".