190471397 has 2 divisors, whose sum is σ = 190471398. Its totient is φ = 190471396.

The previous prime is 190471357. The next prime is 190471427. The reversal of 190471397 is 793174091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172948801 + 17522596 = 13151^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 190471397 - 2¹⁰ = 190470373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190471327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95235698 + 95235699.

It is an arithmetic number, because the mean of its divisors is an integer number (95235699).

Almost surely, 2^190471397 is an apocalyptic number.

It is an amenable number.

190471397 is a deficient number, since it is larger than the sum of its proper divisors (1).

190471397 is an equidigital number, since it uses as much as digits as its factorization.

190471397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 190471397 is about 13801.1375255810. The cubic root of 190471397 is about 575.3647560886.

The spelling of 190471397 in words is "one hundred ninety million, four hundred seventy-one thousand, three hundred ninety-seven".