49991149 has 16 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 45059328.

The previous prime is 49991143. The next prime is 49991159. The reversal of 49991149 is 94119994.

It is a cyclic number.

It is not a de Polignac number, because 49991149 - 2³ = 49991141 is a prime.

It is a super-2 number, since 2×49991149² = 4998229956680402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49991099 and 49991108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49991141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115237 + ... + 115669.

It is an arithmetic number, because the mean of its divisors is an integer number (3445092).

Almost surely, 2^49991149 is an apocalyptic number.

It is an amenable number.

49991149 is a deficient number, since it is larger than the sum of its proper divisors (5130323).

49991149 is a wasteful number, since it uses less digits than its factorization.

49991149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 104976, while the sum is 46.

The square root of 49991149 is about 7070.4419239536. The cubic root of 49991149 is about 368.3814103393.

The spelling of 49991149 in words is "forty-nine million, nine hundred ninety-one thousand, one hundred forty-nine".