190699709 has 2 divisors, whose sum is σ = 190699710. Its totient is φ = 190699708.

The previous prime is 190699703. The next prime is 190699757. The reversal of 190699709 is 907996091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187005625 + 3694084 = 13675^2 + 1922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190699709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190699703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95349854 + 95349855.

It is an arithmetic number, because the mean of its divisors is an integer number (95349855).

Almost surely, 2^190699709 is an apocalyptic number.

It is an amenable number.

190699709 is a deficient number, since it is larger than the sum of its proper divisors (1).

190699709 is an equidigital number, since it uses as much as digits as its factorization.

190699709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 190699709 is about 13809.4065404709. The cubic root of 190699709 is about 575.5945547678.

The spelling of 190699709 in words is "one hundred ninety million, six hundred ninety-nine thousand, seven hundred nine".