197420519 has 4 divisors (see below), whose sum is σ = 198149280. Its totient is φ = 196691760.

The previous prime is 197420459. The next prime is 197420521. The reversal of 197420519 is 915024791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 915024791 = 29 ⋅31552579.

It is a cyclic number.

It is not a de Polignac number, because 197420519 - 2⁸ = 197420263 is a prime.

It is a super-2 number, since 2×197420519² = 77949722644458722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197420599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363974 + ... + 364515.

It is an arithmetic number, because the mean of its divisors is an integer number (49537320).

Almost surely, 2^197420519 is an apocalyptic number.

197420519 is a deficient number, since it is larger than the sum of its proper divisors (728761).

197420519 is an equidigital number, since it uses as much as digits as its factorization.

197420519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728760.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 197420519 is about 14050.6412309190. The cubic root of 197420519 is about 582.2785114563.

The spelling of 197420519 in words is "one hundred ninety-seven million, four hundred twenty thousand, five hundred nineteen".