195406249 has 2 divisors, whose sum is σ = 195406250. Its totient is φ = 195406248.

The previous prime is 195406219. The next prime is 195406301. The reversal of 195406249 is 942604591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194797849 + 608400 = 13957^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 195406249 - 2¹⁵ = 195373481 is a prime.

It is not a weakly prime, because it can be changed into another prime (195406219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97703124 + 97703125.

It is an arithmetic number, because the mean of its divisors is an integer number (97703125).

Almost surely, 2^195406249 is an apocalyptic number.

It is an amenable number.

195406249 is a deficient number, since it is larger than the sum of its proper divisors (1).

195406249 is an equidigital number, since it uses as much as digits as its factorization.

195406249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 195406249 is about 13978.7785231758. The cubic root of 195406249 is about 580.2914201393.

The spelling of 195406249 in words is "one hundred ninety-five million, four hundred six thousand, two hundred forty-nine".