42949523 has 4 divisors (see below), whose sum is σ = 43041960. Its totient is φ = 42857088.

The previous prime is 42949513. The next prime is 42949537. The reversal of 42949523 is 32594924.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42949523 - 2⁴ = 42949507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42949513) 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, 45518 + ... + 46451.

It is an arithmetic number, because the mean of its divisors is an integer number (10760490).

Almost surely, 2^42949523 is an apocalyptic number.

42949523 is a deficient number, since it is larger than the sum of its proper divisors (92437).

42949523 is an equidigital number, since it uses as much as digits as its factorization.

42949523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92436.

The product of its digits is 77760, while the sum is 38.

The square root of 42949523 is about 6553.5885589500. The cubic root of 42949523 is about 350.2026662976.

The spelling of 42949523 in words is "forty-two million, nine hundred forty-nine thousand, five hundred twenty-three".