49897381 has 2 divisors, whose sum is σ = 49897382. Its totient is φ = 49897380.

The previous prime is 49897357. The next prime is 49897387. The reversal of 49897381 is 18379894.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25553025 + 24344356 = 5055^2 + 4934^2 .

It is a cyclic number.

It is not a de Polignac number, because 49897381 - 2²¹ = 47800229 is a prime.

It is a super-2 number, since 2×49897381² = 4979497261318322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49897387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24948690 + 24948691.

It is an arithmetic number, because the mean of its divisors is an integer number (24948691).

Almost surely, 2^49897381 is an apocalyptic number.

It is an amenable number.

49897381 is a deficient number, since it is larger than the sum of its proper divisors (1).

49897381 is an equidigital number, since it uses as much as digits as its factorization.

49897381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 49897381 is about 7063.8078258118. The cubic root of 49897381 is about 368.1509428248.

It can be divided in two parts, 498 and 97381, that added together give a palindrome (97879).

The spelling of 49897381 in words is "forty-nine million, eight hundred ninety-seven thousand, three hundred eighty-one".