63979897 has 4 divisors (see below), whose sum is σ = 67347280. Its totient is φ = 60612516.

The previous prime is 63979873. The next prime is 63979907. The reversal of 63979897 is 79897936.

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 63979897 - 2¹⁵ = 63947129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63979837) 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, 1683663 + ... + 1683700.

It is an arithmetic number, because the mean of its divisors is an integer number (16836820).

Almost surely, 2^63979897 is an apocalyptic number.

It is an amenable number.

63979897 is a deficient number, since it is larger than the sum of its proper divisors (3367383).

63979897 is a wasteful number, since it uses less digits than its factorization.

63979897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367382.

The product of its digits is 5143824, while the sum is 58.

The square root of 63979897 is about 7998.7434638198. The cubic root of 63979897 is about 399.9581143641.

The spelling of 63979897 in words is "sixty-three million, nine hundred seventy-nine thousand, eight hundred ninety-seven".