63290581 has 4 divisors (see below), whose sum is σ = 63715500. Its totient is φ = 62865664.

The previous prime is 63290569. The next prime is 63290599. The reversal of 63290581 is 18509236.

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 4691556 + 58599025 = 2166^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 63290581 - 2¹⁵ = 63257813 is a prime.

It is a super-2 number, since 2×63290581² = 8011395286635122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63290531) 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, 212236 + ... + 212533.

It is an arithmetic number, because the mean of its divisors is an integer number (15928875).

Almost surely, 2^63290581 is an apocalyptic number.

It is an amenable number.

63290581 is a deficient number, since it is larger than the sum of its proper divisors (424919).

63290581 is a wasteful number, since it uses less digits than its factorization.

63290581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424918.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 63290581 is about 7955.5377568081. The cubic root of 63290581 is about 398.5165489838.

The spelling of 63290581 in words is "sixty-three million, two hundred ninety thousand, five hundred eighty-one".