420773345 has 8 divisors (see below), whose sum is σ = 508145064. Its totient is φ = 334473984.

The previous prime is 420773321. The next prime is 420773351. The reversal of 420773345 is 543377024.

It can be written as a sum of positive squares in 4 ways, for example, as 44102881 + 376670464 = 6641^2 + 19408^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420773345 - 2¹⁶ = 420707809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267224 + ... + 268793.

It is an arithmetic number, because the mean of its divisors is an integer number (63518133).

Almost surely, 2^420773345 is an apocalyptic number.

It is an amenable number.

420773345 is a deficient number, since it is larger than the sum of its proper divisors (87371719).

420773345 is a wasteful number, since it uses less digits than its factorization.

420773345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536179.

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 420773345 is about 20512.7605406976. The cubic root of 420773345 is about 749.3465983277.

The spelling of 420773345 in words is "four hundred twenty million, seven hundred seventy-three thousand, three hundred forty-five".