63494905 has 4 divisors (see below), whose sum is σ = 76193892. Its totient is φ = 50795920.

The previous prime is 63494887. The next prime is 63494933. The reversal of 63494905 is 50949436.

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 30558784 + 32936121 = 5528^2 + 5739^2 .

It is not a de Polignac number, because 63494905 - 2⁷ = 63494777 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6349486 + ... + 6349495.

It is an arithmetic number, because the mean of its divisors is an integer number (19048473).

Almost surely, 2^63494905 is an apocalyptic number.

It is an amenable number.

63494905 is a deficient number, since it is larger than the sum of its proper divisors (12698987).

63494905 is a wasteful number, since it uses less digits than its factorization.

63494905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12698986.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 63494905 is about 7968.3690301090. The cubic root of 63494905 is about 398.9449383088.

The spelling of 63494905 in words is "sixty-three million, four hundred ninety-four thousand, nine hundred five".