63698423 has 4 divisors (see below), whose sum is σ = 65420040. Its totient is φ = 61976808.

The previous prime is 63698419. The next prime is 63698429. The reversal of 63698423 is 32489636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63698423 - 2² = 63698419 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 (63698429) 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, 860753 + ... + 860826.

It is an arithmetic number, because the mean of its divisors is an integer number (16355010).

Almost surely, 2^63698423 is an apocalyptic number.

63698423 is a deficient number, since it is larger than the sum of its proper divisors (1721617).

63698423 is a wasteful number, since it uses less digits than its factorization.

63698423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721616.

The product of its digits is 186624, while the sum is 41.

The square root of 63698423 is about 7981.1291807613. The cubic root of 63698423 is about 399.3707251353.

The spelling of 63698423 in words is "sixty-three million, six hundred ninety-eight thousand, four hundred twenty-three".