49018891 has 2 divisors, whose sum is σ = 49018892. Its totient is φ = 49018890.

The previous prime is 49018889. The next prime is 49018901. The reversal of 49018891 is 19881094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49018891 - 2¹ = 49018889 is a prime.

Together with 49018889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49018811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24509445 + 24509446.

It is an arithmetic number, because the mean of its divisors is an integer number (24509446).

Almost surely, 2^49018891 is an apocalyptic number.

49018891 is a deficient number, since it is larger than the sum of its proper divisors (1).

49018891 is an equidigital number, since it uses as much as digits as its factorization.

49018891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 49018891 is about 7001.3492271133. The cubic root of 49018891 is about 365.9775907727.

The spelling of 49018891 in words is "forty-nine million, eighteen thousand, eight hundred ninety-one".