196431685 has 16 divisors (see below), whose sum is σ = 253010736. Its totient is φ = 145870848.

The previous prime is 196431679. The next prime is 196431689. The reversal of 196431685 is 586134691.

It can be written as a sum of positive squares in 8 ways, for example, as 2163841 + 194267844 = 1471^2 + 13938^2 .

It is a cyclic number.

It is not a de Polignac number, because 196431685 - 2⁹ = 196431173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196431689) 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, 9624 + ... + 22033.

It is an arithmetic number, because the mean of its divisors is an integer number (15813171).

Almost surely, 2^196431685 is an apocalyptic number.

It is an amenable number.

196431685 is a deficient number, since it is larger than the sum of its proper divisors (56579051).

196431685 is a wasteful number, since it uses less digits than its factorization.

196431685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31752.

The product of its digits is 155520, while the sum is 43.

The square root of 196431685 is about 14015.4088416999. The cubic root of 196431685 is about 581.3047173987.

The spelling of 196431685 in words is "one hundred ninety-six million, four hundred thirty-one thousand, six hundred eighty-five".