49777381 has 4 divisors (see below), whose sum is σ = 49834764. Its totient is φ = 49720000.

The previous prime is 49777373. The next prime is 49777417. The reversal of 49777381 is 18377794.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18377794 = 2 ⋅9188897.

It can be written as a sum of positive squares in 2 ways, for example, as 8381025 + 41396356 = 2895^2 + 6434^2 .

It is a cyclic number.

It is not a de Polignac number, because 49777381 - 2³ = 49777373 is a prime.

It is a super-2 number, since 2×49777381² = 4955575318438322, 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 (49777331) 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, 27370 + ... + 29131.

It is an arithmetic number, because the mean of its divisors is an integer number (12458691).

Almost surely, 2^49777381 is an apocalyptic number.

It is an amenable number.

49777381 is a deficient number, since it is larger than the sum of its proper divisors (57383).

49777381 is an equidigital number, since it uses as much as digits as its factorization.

49777381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57382.

The product of its digits is 296352, while the sum is 46.

The square root of 49777381 is about 7055.3087104676. The cubic root of 49777381 is about 367.8555794555.

The spelling of 49777381 in words is "forty-nine million, seven hundred seventy-seven thousand, three hundred eighty-one".