49720157 has 4 divisors (see below), whose sum is σ = 49995036. Its totient is φ = 49445280.

The previous prime is 49720147. The next prime is 49720159. The reversal of 49720157 is 75102794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26429881 + 23290276 = 5141^2 + 4826^2 .

It is a cyclic number.

It is not a de Polignac number, because 49720157 - 2¹⁶ = 49654621 is a prime.

It is a super-4 number, since 4×49720157⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49720159) 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 3 ways as a sum of consecutive naturals, for example, 137168 + ... + 137529.

It is an arithmetic number, because the mean of its divisors is an integer number (12498759).

Almost surely, 2^49720157 is an apocalyptic number.

It is an amenable number.

49720157 is a deficient number, since it is larger than the sum of its proper divisors (274879).

49720157 is a wasteful number, since it uses less digits than its factorization.

49720157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274878.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 49720157 is about 7051.2521583049. The cubic root of 49720157 is about 367.7145633365.

The spelling of 49720157 in words is "forty-nine million, seven hundred twenty thousand, one hundred fifty-seven".