420743407 has 4 divisors (see below), whose sum is σ = 480849616. Its totient is φ = 360637200.

The previous prime is 420743371. The next prime is 420743437. The reversal of 420743407 is 704347024.

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

It is a de Polignac number, because none of the positive numbers 2^k-420743407 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 (420743437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30053094 + ... + 30053107.

It is an arithmetic number, because the mean of its divisors is an integer number (120212404).

Almost surely, 2^420743407 is an apocalyptic number.

420743407 is a deficient number, since it is larger than the sum of its proper divisors (60106209).

420743407 is an equidigital number, since it uses as much as digits as its factorization.

420743407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60106208.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 420743407 is about 20512.0307868334. The cubic root of 420743407 is about 749.3288259167.

The spelling of 420743407 in words is "four hundred twenty million, seven hundred forty-three thousand, four hundred seven".