442148293 has 4 divisors (see below), whose sum is σ = 442488928. Its totient is φ = 441807660.

The previous prime is 442148269. The next prime is 442148303. The reversal of 442148293 is 392841244.

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 442148293 - 2²¹ = 440051141 is a prime.

It is a super-2 number, since 2×442148293² = 390990226005627698, 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 (442148243) 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, 168363 + ... + 170968.

It is an arithmetic number, because the mean of its divisors is an integer number (110622232).

Almost surely, 2^442148293 is an apocalyptic number.

It is an amenable number.

442148293 is a deficient number, since it is larger than the sum of its proper divisors (340635).

442148293 is a wasteful number, since it uses less digits than its factorization.

442148293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340634.

The product of its digits is 55296, while the sum is 37.

The square root of 442148293 is about 21027.3225352159. The cubic root of 442148293 is about 761.8263399860.

The spelling of 442148293 in words is "four hundred forty-two million, one hundred forty-eight thousand, two hundred ninety-three".