190979197 has 2 divisors, whose sum is σ = 190979198. Its totient is φ = 190979196.

The previous prime is 190979179. The next prime is 190979209. The reversal of 190979197 is 791979091.

Together with previous prime (190979179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185531641 + 5447556 = 13621^2 + 2334^2 .

It is an emirp because it is prime and its reverse (791979091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190979197 - 2⁷ = 190979069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190979167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95489598 + 95489599.

It is an arithmetic number, because the mean of its divisors is an integer number (95489599).

Almost surely, 2^190979197 is an apocalyptic number.

It is an amenable number.

190979197 is a deficient number, since it is larger than the sum of its proper divisors (1).

190979197 is an equidigital number, since it uses as much as digits as its factorization.

190979197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 321489, while the sum is 52.

The square root of 190979197 is about 13819.5223144651. The cubic root of 190979197 is about 575.8756131307.

The spelling of 190979197 in words is "one hundred ninety million, nine hundred seventy-nine thousand, one hundred ninety-seven".