196651 has 8 divisors (see below), whose sum is σ = 242144. Its totient is φ = 155520.

The previous prime is 196643. The next prime is 196657. The reversal of 196651 is 156691.

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

It is a 7-Lehmer number, since φ(196651) divides (196651-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 196651 - 2³ = 196643 is a prime.

It is a deceptive number, since it divides R₁₉₆₆₅₀.

It is not an unprimeable number, because it can be changed into a prime (196657) 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, 990 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (30268).

2¹⁹⁶⁶⁵¹ is an apocalyptic number.

196651 is a deficient number, since it is larger than the sum of its proper divisors (45493).

196651 is a wasteful number, since it uses less digits than its factorization.

196651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181.

The product of its digits is 1620, while the sum is 28.

The square root of 196651 is about 443.4534924882. The cubic root of 196651 is about 58.1520978210.

It can be divided in two parts, 19 and 6651, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 196651 in words is "one hundred ninety-six thousand, six hundred fifty-one".