190764109 has 2 divisors, whose sum is σ = 190764110. Its totient is φ = 190764108.

The previous prime is 190764071. The next prime is 190764127. The reversal of 190764109 is 901467091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101404900 + 89359209 = 10070^2 + 9453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190764109 is a prime.

It is equal to p_10595494 and since 190764109 and 10595494 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190764179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95382054 + 95382055.

It is an arithmetic number, because the mean of its divisors is an integer number (95382055).

Almost surely, 2^190764109 is an apocalyptic number.

It is an amenable number.

190764109 is a deficient number, since it is larger than the sum of its proper divisors (1).

190764109 is an equidigital number, since it uses as much as digits as its factorization.

190764109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 190764109 is about 13811.7380875833. The cubic root of 190764109 is about 575.6593409485.

The spelling of 190764109 in words is "one hundred ninety million, seven hundred sixty-four thousand, one hundred nine".