442154993 has 4 divisors (see below), whose sum is σ = 505320000. Its totient is φ = 378989988.

The previous prime is 442154983. The next prime is 442155011. The reversal of 442154993 is 399451244.

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 442154993 - 2⁶ = 442154929 is a prime.

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 442154993.

It is not an unprimeable number, because it can be changed into a prime (442154983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31582493 + ... + 31582506.

It is an arithmetic number, because the mean of its divisors is an integer number (126330000).

Almost surely, 2^442154993 is an apocalyptic number.

It is an amenable number.

442154993 is a deficient number, since it is larger than the sum of its proper divisors (63165007).

442154993 is an equidigital number, since it uses as much as digits as its factorization.

442154993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63165006.

The product of its digits is 155520, while the sum is 41.

The square root of 442154993 is about 21027.4818511395. The cubic root of 442154993 is about 761.8301880243.

The spelling of 442154993 in words is "four hundred forty-two million, one hundred fifty-four thousand, nine hundred ninety-three".