49991146 has 4 divisors (see below), whose sum is σ = 74986722. Its totient is φ = 24995572.

The previous prime is 49991143. The next prime is 49991159. The reversal of 49991146 is 64119994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64119994 = 2 ⋅32059997.

It can be written as a sum of positive squares in only one way, i.e., 46090521 + 3900625 = 6789^2 + 1975^2 .

It is a super-2 number, since 2×49991146² = 4998229356786632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49991141) 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, 12497785 + ... + 12497788.

Almost surely, 2^49991146 is an apocalyptic number.

49991146 is a deficient number, since it is larger than the sum of its proper divisors (24995576).

49991146 is a wasteful number, since it uses less digits than its factorization.

49991146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24995575.

The product of its digits is 69984, while the sum is 43.

The square root of 49991146 is about 7070.4417118027. The cubic root of 49991146 is about 368.3814029704.

The spelling of 49991146 in words is "forty-nine million, nine hundred ninety-one thousand, one hundred forty-six".