49991145 has 8 divisors (see below), whose sum is σ = 79985856. Its totient is φ = 26661936.

The previous prime is 49991143. The next prime is 49991159. The reversal of 49991145 is 54119994.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49991145 - 2¹ = 49991143 is a prime.

It is a super-2 number, since 2×49991145² = 4998229156822050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 49991097 and 49991106.

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 in 7 ways as a sum of consecutive naturals, for example, 1666357 + ... + 1666386.

It is an arithmetic number, because the mean of its divisors is an integer number (9998232).

Almost surely, 2^49991145 is an apocalyptic number.

It is an amenable number.

49991145 is a deficient number, since it is larger than the sum of its proper divisors (29994711).

49991145 is a wasteful number, since it uses less digits than its factorization.

49991145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332751.

The product of its digits is 58320, while the sum is 42.

The square root of 49991145 is about 7070.4416410858. The cubic root of 49991145 is about 368.3814005141.

The spelling of 49991145 in words is "forty-nine million, nine hundred ninety-one thousand, one hundred forty-five".