63809197 has 8 divisors (see below), whose sum is σ = 64576512. Its totient is φ = 63046800.

The previous prime is 63809159. The next prime is 63809203. The reversal of 63809197 is 79190836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63809197 - 2⁷ = 63809069 is a prime.

It is a super-2 number, since 2×63809197² = 8143227243569618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63807197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29172 + ... + 31282.

It is an arithmetic number, because the mean of its divisors is an integer number (8072064).

Almost surely, 2^63809197 is an apocalyptic number.

It is an amenable number.

63809197 is a deficient number, since it is larger than the sum of its proper divisors (767315).

63809197 is a wasteful number, since it uses less digits than its factorization.

63809197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 63809197 is about 7988.0659110951. The cubic root of 63809197 is about 399.6020980664.

The spelling of 63809197 in words is "sixty-three million, eight hundred nine thousand, one hundred ninety-seven".