48729781 has 4 divisors (see below), whose sum is σ = 49161132. Its totient is φ = 48298432.

The previous prime is 48729767. The next prime is 48729787. The reversal of 48729781 is 18792784.

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 5564881 + 43164900 = 2359^2 + 6570^2 .

It is a cyclic number.

It is not a de Polignac number, because 48729781 - 2⁹ = 48729269 is a prime.

It is a super-2 number, since 2×48729781² = 4749183112615922, which contains 22 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 (48729787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215506 + ... + 215731.

It is an arithmetic number, because the mean of its divisors is an integer number (12290283).

Almost surely, 2^48729781 is an apocalyptic number.

It is an amenable number.

48729781 is a deficient number, since it is larger than the sum of its proper divisors (431351).

48729781 is a wasteful number, since it uses less digits than its factorization.

48729781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431350.

The product of its digits is 225792, while the sum is 46.

The square root of 48729781 is about 6980.6719590595. The cubic root of 48729781 is about 365.2566681581.

The spelling of 48729781 in words is "forty-eight million, seven hundred twenty-nine thousand, seven hundred eighty-one".