49019891 has 12 divisors (see below), whose sum is σ = 52828560. Its totient is φ = 45467520.

The previous prime is 49019881. The next prime is 49019903. The reversal of 49019891 is 19891094.

It is not a de Polignac number, because 49019891 - 2¹⁰ = 49018867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49019801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19325 + ... + 21713.

It is an arithmetic number, because the mean of its divisors is an integer number (4402380).

Almost surely, 2^49019891 is an apocalyptic number.

49019891 is a deficient number, since it is larger than the sum of its proper divisors (3808669).

49019891 is a wasteful number, since it uses less digits than its factorization.

49019891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2477 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 49019891 is about 7001.4206415555. The cubic root of 49019891 is about 365.9800794397.

The spelling of 49019891 in words is "forty-nine million, nineteen thousand, eight hundred ninety-one".