198402065 has 4 divisors (see below), whose sum is σ = 238082484. Its totient is φ = 158721648.

The previous prime is 198402037. The next prime is 198402107. The reversal of 198402065 is 560204891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 83740801 + 114661264 = 9151^2 + 10708^2 .

It is a cyclic number.

It is not a de Polignac number, because 198402065 - 2¹⁰ = 198401041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19840202 + ... + 19840211.

It is an arithmetic number, because the mean of its divisors is an integer number (59520621).

Almost surely, 2^198402065 is an apocalyptic number.

It is an amenable number.

198402065 is a deficient number, since it is larger than the sum of its proper divisors (39680419).

198402065 is an equidigital number, since it uses as much as digits as its factorization.

198402065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39680418.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 198402065 is about 14085.5267917107. The cubic root of 198402065 is about 583.2419178290.

The spelling of 198402065 in words is "one hundred ninety-eight million, four hundred two thousand, sixty-five".