49681861 has 4 divisors (see below), whose sum is σ = 51024652. Its totient is φ = 48339072.

The previous prime is 49681859. The next prime is 49681883. The reversal of 49681861 is 16818694.

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 32092225 + 17589636 = 5665^2 + 4194^2 .

It is a cyclic number.

It is not a de Polignac number, because 49681861 - 2¹ = 49681859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49681661) 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, 671340 + ... + 671413.

It is an arithmetic number, because the mean of its divisors is an integer number (12756163).

Almost surely, 2^49681861 is an apocalyptic number.

It is an amenable number.

49681861 is a deficient number, since it is larger than the sum of its proper divisors (1342791).

49681861 is a wasteful number, since it uses less digits than its factorization.

49681861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342790.

The product of its digits is 82944, while the sum is 43.

The square root of 49681861 is about 7048.5360891465. The cubic root of 49681861 is about 367.6201307175.

The spelling of 49681861 in words is "forty-nine million, six hundred eighty-one thousand, eight hundred sixty-one".