49691641 has 4 divisors (see below), whose sum is σ = 49781412. Its totient is φ = 49601872.

The previous prime is 49691639. The next prime is 49691647. The reversal of 49691641 is 14619694.

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 22610025 + 27081616 = 4755^2 + 5204^2 .

It is a cyclic number.

It is not a de Polignac number, because 49691641 - 2¹ = 49691639 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49691594 and 49691603.

It is not an unprimeable number, because it can be changed into a prime (49691647) 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, 44050 + ... + 45163.

It is an arithmetic number, because the mean of its divisors is an integer number (12445353).

Almost surely, 2^49691641 is an apocalyptic number.

It is an amenable number.

49691641 is a deficient number, since it is larger than the sum of its proper divisors (89771).

49691641 is an equidigital number, since it uses as much as digits as its factorization.

49691641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89770.

The product of its digits is 46656, while the sum is 40.

The square root of 49691641 is about 7049.2298160863. The cubic root of 49691641 is about 367.6442514524.

The spelling of 49691641 in words is "forty-nine million, six hundred ninety-one thousand, six hundred forty-one".