190399387 has 2 divisors, whose sum is σ = 190399388. Its totient is φ = 190399386.

The previous prime is 190399369. The next prime is 190399409. The reversal of 190399387 is 783993091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190399387 - 2⁷ = 190399259 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190399387.

It is not a weakly prime, because it can be changed into another prime (190399357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95199693 + 95199694.

It is an arithmetic number, because the mean of its divisors is an integer number (95199694).

Almost surely, 2^190399387 is an apocalyptic number.

190399387 is a deficient number, since it is larger than the sum of its proper divisors (1).

190399387 is an equidigital number, since it uses as much as digits as its factorization.

190399387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 190399387 is about 13798.5284360326. The cubic root of 190399387 is about 575.2922390963.

The spelling of 190399387 in words is "one hundred ninety million, three hundred ninety-nine thousand, three hundred eighty-seven".