49157009 has 12 divisors (see below), whose sum is σ = 56601360. Its totient is φ = 42332760.

The previous prime is 49156997. The next prime is 49157021. The reversal of 49157009 is 90075194.

49157009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (49156997) and next prime (49157021).

It is a de Polignac number, because none of the positive numbers 2^k-49157009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49157009.

It is not an unprimeable number, because it can be changed into a prime (49157209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2219 + ... + 10160.

It is an arithmetic number, because the mean of its divisors is an integer number (4716780).

Almost surely, 2^49157009 is an apocalyptic number.

It is an amenable number.

49157009 is a deficient number, since it is larger than the sum of its proper divisors (7444351).

49157009 is a wasteful number, since it uses less digits than its factorization.

49157009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428 (or 12409 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 49157009 is about 7011.2059590344. The cubic root of 49157009 is about 366.3210004966.

The spelling of 49157009 in words is "forty-nine million, one hundred fifty-seven thousand, nine".