49000991 has 8 divisors (see below), whose sum is σ = 53766720. Its totient is φ = 44377632.

The previous prime is 49000967. The next prime is 49000993. The reversal of 49000991 is 19900094.

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

It is a de Polignac number, because none of the positive numbers 2^k-49000991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49000993) 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, 34871 + ... + 36248.

It is an arithmetic number, because the mean of its divisors is an integer number (6720840).

Almost surely, 2^49000991 is an apocalyptic number.

49000991 is a deficient number, since it is larger than the sum of its proper divisors (4765729).

49000991 is a wasteful number, since it uses less digits than its factorization.

49000991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71185.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 49000991 is about 7000.0707853564. The cubic root of 49000991 is about 365.9330379054.

The spelling of 49000991 in words is "forty-nine million, nine hundred ninety-one", and thus it is an aban number.