63641091 has 4 divisors (see below), whose sum is σ = 84854792. Its totient is φ = 42427392.

The previous prime is 63641033. The next prime is 63641093. The reversal of 63641091 is 19014636.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63641091 - 2¹⁴ = 63624707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63641093) 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, 10606846 + ... + 10606851.

It is an arithmetic number, because the mean of its divisors is an integer number (21213698).

Almost surely, 2^63641091 is an apocalyptic number.

63641091 is a deficient number, since it is larger than the sum of its proper divisors (21213701).

63641091 is a wasteful number, since it uses less digits than its factorization.

63641091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213700.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 63641091 is about 7977.5366498688. The cubic root of 63641091 is about 399.2508708061.

The spelling of 63641091 in words is "sixty-three million, six hundred forty-one thousand, ninety-one".