49499991 has 10 divisors (see below), whose sum is σ = 73944552. Its totient is φ = 32999940.

The previous prime is 49499987. The next prime is 49500023. The reversal of 49499991 is 19999494.

It is not a de Polignac number, because 49499991 - 2² = 49499987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49499941) 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 9 ways as a sum of consecutive naturals, for example, 305475 + ... + 305636.

Almost surely, 2^49499991 is an apocalyptic number.

49499991 is a deficient number, since it is larger than the sum of its proper divisors (24444561).

49499991 is an equidigital number, since it uses as much as digits as its factorization.

49499991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611123 (or 611114 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 49499991 is about 7035.6230001330. The cubic root of 49499991 is about 367.1710008497.

The spelling of 49499991 in words is "forty-nine million, four hundred ninety-nine thousand, nine hundred ninety-one".