190778113 has 2 divisors, whose sum is σ = 190778114. Its totient is φ = 190778112.

The previous prime is 190778101. The next prime is 190778141. The reversal of 190778113 is 311877091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144769024 + 46009089 = 12032^2 + 6783^2 .

It is a cyclic number.

It is not a de Polignac number, because 190778113 - 2²⁵ = 157223681 is a prime.

It is not a weakly prime, because it can be changed into another prime (190778213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95389056 + 95389057.

It is an arithmetic number, because the mean of its divisors is an integer number (95389057).

Almost surely, 2^190778113 is an apocalyptic number.

It is an amenable number.

190778113 is a deficient number, since it is larger than the sum of its proper divisors (1).

190778113 is an equidigital number, since it uses as much as digits as its factorization.

190778113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 37.

The square root of 190778113 is about 13812.2450383708. The cubic root of 190778113 is about 575.6734269947.

The spelling of 190778113 in words is "one hundred ninety million, seven hundred seventy-eight thousand, one hundred thirteen".