197853919 has 2 divisors, whose sum is σ = 197853920. Its totient is φ = 197853918.

The previous prime is 197853829. The next prime is 197853923. The reversal of 197853919 is 919358791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197853919 - 2⁷ = 197853791 is a prime.

It is a super-2 number, since 2×197853919² = 78292346527317122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197853119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98926959 + 98926960.

It is an arithmetic number, because the mean of its divisors is an integer number (98926960).

Almost surely, 2^197853919 is an apocalyptic number.

197853919 is a deficient number, since it is larger than the sum of its proper divisors (1).

197853919 is an equidigital number, since it uses as much as digits as its factorization.

197853919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 52.

The square root of 197853919 is about 14066.0555593955. The cubic root of 197853919 is about 582.7042947261.

The spelling of 197853919 in words is "one hundred ninety-seven million, eight hundred fifty-three thousand, nine hundred nineteen".