49905397 has 2 divisors, whose sum is σ = 49905398. Its totient is φ = 49905396.

The previous prime is 49905391. The next prime is 49905407. The reversal of 49905397 is 79350994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41873841 + 8031556 = 6471^2 + 2834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49905397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49905391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24952698 + 24952699.

It is an arithmetic number, because the mean of its divisors is an integer number (24952699).

Almost surely, 2^49905397 is an apocalyptic number.

It is an amenable number.

49905397 is a deficient number, since it is larger than the sum of its proper divisors (1).

49905397 is an equidigital number, since it uses as much as digits as its factorization.

49905397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 49905397 is about 7064.3752023799. The cubic root of 49905397 is about 368.1706562171.

The spelling of 49905397 in words is "forty-nine million, nine hundred five thousand, three hundred ninety-seven".