196953581 has 4 divisors (see below), whose sum is σ = 214858464. Its totient is φ = 179048700.

The previous prime is 196953569. The next prime is 196953593. The reversal of 196953581 is 185359691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (196953569) and next prime (196953593).

It is a cyclic number.

It is not a de Polignac number, because 196953581 - 2¹⁰ = 196952557 is a prime.

It is a super-2 number, since 2×196953581² = 77581426137447122, 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 (196953481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8952425 + ... + 8952446.

It is an arithmetic number, because the mean of its divisors is an integer number (53714616).

Almost surely, 2^196953581 is an apocalyptic number.

196953581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

196953581 is a deficient number, since it is larger than the sum of its proper divisors (17904883).

196953581 is a wasteful number, since it uses less digits than its factorization.

196953581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17904882.

The product of its digits is 291600, while the sum is 47.

The square root of 196953581 is about 14034.0151417903. The cubic root of 196953581 is about 581.8190816681.

The spelling of 196953581 in words is "one hundred ninety-six million, nine hundred fifty-three thousand, five hundred eighty-one".