49397281 has 2 divisors, whose sum is σ = 49397282. Its totient is φ = 49397280.

The previous prime is 49397279. The next prime is 49397297. The reversal of 49397281 is 18279394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49350625 + 46656 = 7025^2 + 216^2 .

It is a cyclic number.

It is not a de Polignac number, because 49397281 - 2¹ = 49397279 is a prime.

It is a super-2 number, since 2×49397281² = 4880182740385922, which contains 22 as substring.

Together with 49397279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49397081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24698640 + 24698641.

It is an arithmetic number, because the mean of its divisors is an integer number (24698641).

Almost surely, 2^49397281 is an apocalyptic number.

It is an amenable number.

49397281 is a deficient number, since it is larger than the sum of its proper divisors (1).

49397281 is an equidigital number, since it uses as much as digits as its factorization.

49397281 is an evil number, because the sum of its binary digits is even.

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

The square root of 49397281 is about 7028.3199272657. The cubic root of 49397281 is about 366.9168711927.

The spelling of 49397281 in words is "forty-nine million, three hundred ninety-seven thousand, two hundred eighty-one".