49159991 has 8 divisors (see below), whose sum is σ = 50455440. Its totient is φ = 47878272.

The previous prime is 49159969. The next prime is 49160003. The reversal of 49159991 is 19995194.

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 49159991 - 2¹⁸ = 48897847 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 (49159091) 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, 4031 + ... + 10703.

It is an arithmetic number, because the mean of its divisors is an integer number (6306930).

Almost surely, 2^49159991 is an apocalyptic number.

49159991 is a deficient number, since it is larger than the sum of its proper divisors (1295449).

49159991 is a wasteful number, since it uses less digits than its factorization.

49159991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6865.

The product of its digits is 131220, while the sum is 47.

The square root of 49159991 is about 7011.4186153731. The cubic root of 49159991 is about 366.3284076948.

The spelling of 49159991 in words is "forty-nine million, one hundred fifty-nine thousand, nine hundred ninety-one".