49863991 has 2 divisors, whose sum is σ = 49863992. Its totient is φ = 49863990.

The previous prime is 49863959. The next prime is 49864019. The reversal of 49863991 is 19936894.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49863991 - 2⁵ = 49863959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49863491) 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, 24931995 + 24931996.

It is an arithmetic number, because the mean of its divisors is an integer number (24931996).

Almost surely, 2^49863991 is an apocalyptic number.

49863991 is a deficient number, since it is larger than the sum of its proper divisors (1).

49863991 is an equidigital number, since it uses as much as digits as its factorization.

49863991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 49863991 is about 7061.4439741458. The cubic root of 49863991 is about 368.0688055616.

The spelling of 49863991 in words is "forty-nine million, eight hundred sixty-three thousand, nine hundred ninety-one".