195724381 has 2 divisors, whose sum is σ = 195724382. Its totient is φ = 195724380.

The previous prime is 195724367. The next prime is 195724387. The reversal of 195724381 is 183427591.

195724381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101828281 + 93896100 = 10091^2 + 9690^2 .

It is a cyclic number.

It is not a de Polignac number, because 195724381 - 2⁷ = 195724253 is a prime.

It is a super-2 number, since 2×195724381² = 76616066635666322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195724387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97862190 + 97862191.

It is an arithmetic number, because the mean of its divisors is an integer number (97862191).

Almost surely, 2^195724381 is an apocalyptic number.

It is an amenable number.

195724381 is a deficient number, since it is larger than the sum of its proper divisors (1).

195724381 is an equidigital number, since it uses as much as digits as its factorization.

195724381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 195724381 is about 13990.1530013077. The cubic root of 195724381 is about 580.6061647237.

The spelling of 195724381 in words is "one hundred ninety-five million, seven hundred twenty-four thousand, three hundred eighty-one".