63406549 has 4 divisors (see below), whose sum is σ = 67136364. Its totient is φ = 59676736.

The previous prime is 63406547. The next prime is 63406571. The reversal of 63406549 is 94560436.

It is a happy number.

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 23590449 + 39816100 = 4857^2 + 6310^2 .

It is a cyclic number.

It is not a de Polignac number, because 63406549 - 2¹ = 63406547 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 (63406543) 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, 1864882 + ... + 1864915.

It is an arithmetic number, because the mean of its divisors is an integer number (16784091).

Almost surely, 2^63406549 is an apocalyptic number.

It is an amenable number.

63406549 is a deficient number, since it is larger than the sum of its proper divisors (3729815).

63406549 is a wasteful number, since it uses less digits than its factorization.

63406549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729814.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 63406549 is about 7962.8229290874. The cubic root of 63406549 is about 398.7598024994.

The spelling of 63406549 in words is "sixty-three million, four hundred six thousand, five hundred forty-nine".