63241991 has 4 divisors (see below), whose sum is σ = 64951272. Its totient is φ = 61532712.

The previous prime is 63241979. The next prime is 63241993. The reversal of 63241991 is 19914236.

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 63241991 - 2¹⁴ = 63225607 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 (63241993) 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, 854585 + ... + 854658.

It is an arithmetic number, because the mean of its divisors is an integer number (16237818).

Almost surely, 2^63241991 is an apocalyptic number.

63241991 is a deficient number, since it is larger than the sum of its proper divisors (1709281).

63241991 is a wasteful number, since it uses less digits than its factorization.

63241991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709280.

The product of its digits is 11664, while the sum is 35.

The square root of 63241991 is about 7952.4833228370. The cubic root of 63241991 is about 398.4145386671.

The spelling of 63241991 in words is "sixty-three million, two hundred forty-one thousand, nine hundred ninety-one".