63494381 has 4 divisors (see below), whose sum is σ = 63512064. Its totient is φ = 63476700.

The previous prime is 63494341. The next prime is 63494393. The reversal of 63494381 is 18349436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63494381 - 2⁶ = 63494317 is a prime.

It is a super-2 number, since 2×63494381² = 8063072837146322, 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 (63494341) 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, 1325 + ... + 11346.

It is an arithmetic number, because the mean of its divisors is an integer number (15878016).

Almost surely, 2^63494381 is an apocalyptic number.

It is an amenable number.

63494381 is a deficient number, since it is larger than the sum of its proper divisors (17683).

63494381 is a wasteful number, since it uses less digits than its factorization.

63494381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17682.

The product of its digits is 62208, while the sum is 38.

The square root of 63494381 is about 7968.3361500378. The cubic root of 63494381 is about 398.9438408574.

The spelling of 63494381 in words is "sixty-three million, four hundred ninety-four thousand, three hundred eighty-one".