196237861 has 4 divisors (see below), whose sum is σ = 196297900. Its totient is φ = 196177824.

The previous prime is 196237801. The next prime is 196237889. The reversal of 196237861 is 168732691.

196237861 = 9905² + 9906².

196237861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 98109025 + 98128836 = 9905^2 + 9906^2 .

It is a cyclic number.

It is not a de Polignac number, because 196237861 - 2²³ = 187849253 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 (196237801) 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, 24816 + ... + 31753.

It is an arithmetic number, because the mean of its divisors is an integer number (49074475).

Almost surely, 2^196237861 is an apocalyptic number.

196237861 is the 9906-th centered square number.

It is an amenable number.

196237861 is a deficient number, since it is larger than the sum of its proper divisors (60039).

196237861 is an equidigital number, since it uses as much as digits as its factorization.

196237861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60038.

The product of its digits is 108864, while the sum is 43.

The square root of 196237861 is about 14008.4924599330. The cubic root of 196237861 is about 581.1134585662.

The spelling of 196237861 in words is "one hundred ninety-six million, two hundred thirty-seven thousand, eight hundred sixty-one".