427919197 has 4 divisors (see below), whose sum is σ = 450441280. Its totient is φ = 405397116.

The previous prime is 427919137. The next prime is 427919207. The reversal of 427919197 is 791919724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 427919197 - 2⁷ = 427919069 is a prime.

It is a super-2 number, since 2×427919197² = 366229678322249618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427919197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427919137) 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, 11261013 + ... + 11261050.

It is an arithmetic number, because the mean of its divisors is an integer number (112610320).

Almost surely, 2^427919197 is an apocalyptic number.

It is an amenable number.

427919197 is a deficient number, since it is larger than the sum of its proper divisors (22522083).

427919197 is a wasteful number, since it uses less digits than its factorization.

427919197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22522082.

The product of its digits is 285768, while the sum is 49.

The square root of 427919197 is about 20686.2078931833. The cubic root of 427919197 is about 753.5647760219.

The spelling of 427919197 in words is "four hundred twenty-seven million, nine hundred nineteen thousand, one hundred ninety-seven".