193406663 has 8 divisors (see below), whose sum is σ = 194849088. Its totient is φ = 191970144.

The previous prime is 193406641. The next prime is 193406669. The reversal of 193406663 is 366604391.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193406663 is a prime.

It is a super-2 number, since 2×193406663² = 74812274585591138, 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 (193406669) 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, 79970 + ... + 82352.

It is an arithmetic number, because the mean of its divisors is an integer number (24356136).

Almost surely, 2^193406663 is an apocalyptic number.

193406663 is a deficient number, since it is larger than the sum of its proper divisors (1442425).

193406663 is a wasteful number, since it uses less digits than its factorization.

193406663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 193406663 is about 13907.0724093894. The cubic root of 193406663 is about 578.3052619391.

The spelling of 193406663 in words is "one hundred ninety-three million, four hundred six thousand, six hundred sixty-three".