63487261 has 4 divisors (see below), whose sum is σ = 63913500. Its totient is φ = 63061024.

The previous prime is 63487247. The next prime is 63487283. The reversal of 63487261 is 16278436.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15960025 + 47527236 = 3995^2 + 6894^2 .

It is a cyclic number.

It is not a de Polignac number, because 63487261 - 2²³ = 55098653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63487261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63487201) 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, 212896 + ... + 213193.

It is an arithmetic number, because the mean of its divisors is an integer number (15978375).

Almost surely, 2^63487261 is an apocalyptic number.

It is an amenable number.

63487261 is a deficient number, since it is larger than the sum of its proper divisors (426239).

63487261 is a wasteful number, since it uses less digits than its factorization.

63487261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426238.

The product of its digits is 48384, while the sum is 37.

The square root of 63487261 is about 7967.8893692119. The cubic root of 63487261 is about 398.9289283235.

The spelling of 63487261 in words is "sixty-three million, four hundred eighty-seven thousand, two hundred sixty-one".