197993653 has 16 divisors (see below), whose sum is σ = 235896192. Its totient is φ = 163800000.

The previous prime is 197993647. The next prime is 197993659. The reversal of 197993653 is 356399791.

It is an interprime number because it is at equal distance from previous prime (197993647) and next prime (197993659).

It is not a de Polignac number, because 197993653 - 2²¹ = 195896501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197993653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197993659) 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, 403 + ... + 19903.

It is an arithmetic number, because the mean of its divisors is an integer number (14743512).

Almost surely, 2^197993653 is an apocalyptic number.

197993653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

197993653 is a deficient number, since it is larger than the sum of its proper divisors (37902539).

197993653 is a wasteful number, since it uses less digits than its factorization.

197993653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19596.

The product of its digits is 1377810, while the sum is 52.

The square root of 197993653 is about 14071.0217468384. The cubic root of 197993653 is about 582.8414404233.

The spelling of 197993653 in words is "one hundred ninety-seven million, nine hundred ninety-three thousand, six hundred fifty-three".