42919453 has 4 divisors (see below), whose sum is σ = 43729308. Its totient is φ = 42109600.

The previous prime is 42919439. The next prime is 42919477. The reversal of 42919453 is 35491924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38601369 + 4318084 = 6213^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 42919453 - 2⁵ = 42919421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42919433) 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, 404848 + ... + 404953.

It is an arithmetic number, because the mean of its divisors is an integer number (10932327).

Almost surely, 2^42919453 is an apocalyptic number.

It is an amenable number.

42919453 is a deficient number, since it is larger than the sum of its proper divisors (809855).

42919453 is an equidigital number, since it uses as much as digits as its factorization.

42919453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809854.

The product of its digits is 38880, while the sum is 37.

The square root of 42919453 is about 6551.2939943190. The cubic root of 42919453 is about 350.1209187641.

The spelling of 42919453 in words is "forty-two million, nine hundred nineteen thousand, four hundred fifty-three".