190621427 has 2 divisors, whose sum is σ = 190621428. Its totient is φ = 190621426.

The previous prime is 190621363. The next prime is 190621477. The reversal of 190621427 is 724126091.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190621427 - 2⁶ = 190621363 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 190621393 and 190621402.

It is not a weakly prime, because it can be changed into another prime (190621477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95310713 + 95310714.

It is an arithmetic number, because the mean of its divisors is an integer number (95310714).

Almost surely, 2^190621427 is an apocalyptic number.

190621427 is a deficient number, since it is larger than the sum of its proper divisors (1).

190621427 is an equidigital number, since it uses as much as digits as its factorization.

190621427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 190621427 is about 13806.5718771895. The cubic root of 190621427 is about 575.5157836987.

The spelling of 190621427 in words is "one hundred ninety million, six hundred twenty-one thousand, four hundred twenty-seven".