49281977 has 4 divisors (see below), whose sum is σ = 49421940. Its totient is φ = 49142016.

The previous prime is 49281943. The next prime is 49281983. The reversal of 49281977 is 77918294.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77918294 = 2 ⋅38959147.

It can be written as a sum of positive squares in 2 ways, for example, as 36529936 + 12752041 = 6044^2 + 3571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49281977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49281907) 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, 69452 + ... + 70157.

It is an arithmetic number, because the mean of its divisors is an integer number (12355485).

Almost surely, 2^49281977 is an apocalyptic number.

It is an amenable number.

49281977 is a deficient number, since it is larger than the sum of its proper divisors (139963).

49281977 is a wasteful number, since it uses less digits than its factorization.

49281977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139962.

The product of its digits is 254016, while the sum is 47.

The square root of 49281977 is about 7020.1123210387. The cubic root of 49281977 is about 366.6311608411.

The spelling of 49281977 in words is "forty-nine million, two hundred eighty-one thousand, nine hundred seventy-seven".