49186681 has 4 divisors (see below), whose sum is σ = 49401700. Its totient is φ = 48971664.

The previous prime is 49186637. The next prime is 49186691. The reversal of 49186681 is 18668194.

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 27657081 + 21529600 = 5259^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 49186681 - 2⁹ = 49186169 is a prime.

It is a super-2 number, since 2×49186681² = 4838659175591522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49186691) 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, 107166 + ... + 107623.

It is an arithmetic number, because the mean of its divisors is an integer number (12350425).

Almost surely, 2^49186681 is an apocalyptic number.

It is an amenable number.

49186681 is a deficient number, since it is larger than the sum of its proper divisors (215019).

49186681 is a wasteful number, since it uses less digits than its factorization.

49186681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215018.

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

The square root of 49186681 is about 7013.3216809155. The cubic root of 49186681 is about 366.3946915170.

The spelling of 49186681 in words is "forty-nine million, one hundred eighty-six thousand, six hundred eighty-one".