63207491 has 4 divisors (see below), whose sum is σ = 63323592. Its totient is φ = 63091392.

The previous prime is 63207457. The next prime is 63207493. The reversal of 63207491 is 19470236.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63207491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63207493) 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, 57230 + ... + 58323.

It is an arithmetic number, because the mean of its divisors is an integer number (15830898).

Almost surely, 2^63207491 is an apocalyptic number.

63207491 is a deficient number, since it is larger than the sum of its proper divisors (116101).

63207491 is a wasteful number, since it uses less digits than its factorization.

63207491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116100.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 63207491 is about 7950.3138931743. The cubic root of 63207491 is about 398.3420773083.

The spelling of 63207491 in words is "sixty-three million, two hundred seven thousand, four hundred ninety-one".