63219797 has 4 divisors (see below), whose sum is σ = 65399820. Its totient is φ = 61039776.

The previous prime is 63219763. The next prime is 63219803. The reversal of 63219797 is 79791236.

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 29008996 + 34210801 = 5386^2 + 5849^2 .

It is a cyclic number.

It is not a de Polignac number, because 63219797 - 2⁶ = 63219733 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 (63219697) 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, 1089968 + ... + 1090025.

It is an arithmetic number, because the mean of its divisors is an integer number (16349955).

Almost surely, 2^63219797 is an apocalyptic number.

It is an amenable number.

63219797 is a deficient number, since it is larger than the sum of its proper divisors (2180023).

63219797 is a wasteful number, since it uses less digits than its factorization.

63219797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180022.

The product of its digits is 142884, while the sum is 44.

The square root of 63219797 is about 7951.0877872150. The cubic root of 63219797 is about 398.3679269844.

The spelling of 63219797 in words is "sixty-three million, two hundred nineteen thousand, seven hundred ninety-seven".