42919197 has 4 divisors (see below), whose sum is σ = 57225600. Its totient is φ = 28612796.

The previous prime is 42919193. The next prime is 42919231. The reversal of 42919197 is 79191924.

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 42919197 - 2² = 42919193 is a prime.

It is a super-2 number, since 2×42919197² = 3684114942249618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42919193) 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, 7153197 + ... + 7153202.

It is an arithmetic number, because the mean of its divisors is an integer number (14306400).

Almost surely, 2^42919197 is an apocalyptic number.

It is an amenable number.

42919197 is a deficient number, since it is larger than the sum of its proper divisors (14306403).

42919197 is a wasteful number, since it uses less digits than its factorization.

42919197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14306402.

The product of its digits is 40824, while the sum is 42.

The square root of 42919197 is about 6551.2744561650. The cubic root of 42919197 is about 350.1202226452.

The spelling of 42919197 in words is "forty-two million, nine hundred nineteen thousand, one hundred ninety-seven".