63641191 has 4 divisors (see below), whose sum is σ = 63693000. Its totient is φ = 63589384.

The previous prime is 63641189. The next prime is 63641209. The reversal of 63641191 is 19114636.

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

It is a cyclic number.

It is not a de Polignac number, because 63641191 - 2¹ = 63641189 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 (63641131) 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, 24016 + ... + 26533.

It is an arithmetic number, because the mean of its divisors is an integer number (15923250).

Almost surely, 2^63641191 is an apocalyptic number.

63641191 is a deficient number, since it is larger than the sum of its proper divisors (51809).

63641191 is a wasteful number, since it uses less digits than its factorization.

63641191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51808.

The product of its digits is 3888, while the sum is 31.

The square root of 63641191 is about 7977.5429174653. The cubic root of 63641191 is about 399.2510799219.

The spelling of 63641191 in words is "sixty-three million, six hundred forty-one thousand, one hundred ninety-one".