193668431 has 16 divisors (see below), whose sum is σ = 217016448. Its totient is φ = 171309600.

The previous prime is 193668427. The next prime is 193668443. The reversal of 193668431 is 134866391.

It is not a de Polignac number, because 193668431 - 2² = 193668427 is a prime.

It is a super-2 number, since 2×193668431² = 75014922332003522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193668401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155945 + ... + 157181.

It is an arithmetic number, because the mean of its divisors is an integer number (13563528).

Almost surely, 2^193668431 is an apocalyptic number.

193668431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

193668431 is a deficient number, since it is larger than the sum of its proper divisors (23348017).

193668431 is a wasteful number, since it uses less digits than its factorization.

193668431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its digits is 93312, while the sum is 41.

The square root of 193668431 is about 13916.4805536457. The cubic root of 193668431 is about 578.5660484850.

The spelling of 193668431 in words is "one hundred ninety-three million, six hundred sixty-eight thousand, four hundred thirty-one".