49991147 has 8 divisors (see below), whose sum is σ = 53486160. Its totient is φ = 46582560.

The previous prime is 49991143. The next prime is 49991159. The reversal of 49991147 is 74119994.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 49991147 - 2² = 49991143 is a prime.

It is a super-2 number, since 2×49991147² = 4998229556751218, 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 = 49991098 and 49991107.

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 7 ways as a sum of consecutive naturals, for example, 20408 + ... + 22725.

It is an arithmetic number, because the mean of its divisors is an integer number (6685770).

Almost surely, 2^49991147 is an apocalyptic number.

49991147 is a deficient number, since it is larger than the sum of its proper divisors (3495013).

49991147 is a wasteful number, since it uses less digits than its factorization.

49991147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43213.

The product of its digits is 81648, while the sum is 44.

The square root of 49991147 is about 7070.4417825197. The cubic root of 49991147 is about 368.3814054267.

The spelling of 49991147 in words is "forty-nine million, nine hundred ninety-one thousand, one hundred forty-seven".