63240991 has 8 divisors (see below), whose sum is σ = 70458624. Its totient is φ = 56268120.

The previous prime is 63240977. The next prime is 63241021. The reversal of 63240991 is 19904236.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63240991 - 2⁹ = 63240479 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 (63240091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60645 + ... + 61678.

It is an arithmetic number, because the mean of its divisors is an integer number (8807328).

Almost surely, 2^63240991 is an apocalyptic number.

63240991 is a deficient number, since it is larger than the sum of its proper divisors (7217633).

63240991 is a wasteful number, since it uses less digits than its factorization.

63240991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122381.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 63240991 is about 7952.4204491463. The cubic root of 63240991 is about 398.4124387087.

The spelling of 63240991 in words is "sixty-three million, two hundred forty thousand, nine hundred ninety-one".