196434721 has 4 divisors (see below), whose sum is σ = 224496832. Its totient is φ = 168372612.

The previous prime is 196434709. The next prime is 196434767. The reversal of 196434721 is 127434691.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196434721 is a prime.

It is a super-2 number, since 2×196434721² = 77173199228695682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (196434781) 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, 14031045 + ... + 14031058.

It is an arithmetic number, because the mean of its divisors is an integer number (56124208).

Almost surely, 2^196434721 is an apocalyptic number.

It is an amenable number.

196434721 is a deficient number, since it is larger than the sum of its proper divisors (28062111).

196434721 is an equidigital number, since it uses as much as digits as its factorization.

196434721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28062110.

The product of its digits is 36288, while the sum is 37.

The square root of 196434721 is about 14015.5171506441. The cubic root of 196434721 is about 581.3077122177.

The spelling of 196434721 in words is "one hundred ninety-six million, four hundred thirty-four thousand, seven hundred twenty-one".