420694705 has 4 divisors (see below), whose sum is σ = 504833652. Its totient is φ = 336555760.

The previous prime is 420694691. The next prime is 420694741. The reversal of 420694705 is 507496024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 134374464 + 286320241 = 11592^2 + 16921^2 .

It is not a de Polignac number, because 420694705 - 2⁷ = 420694577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 42069466 + ... + 42069475.

It is an arithmetic number, because the mean of its divisors is an integer number (126208413).

Almost surely, 2^420694705 is an apocalyptic number.

It is an amenable number.

420694705 is a deficient number, since it is larger than the sum of its proper divisors (84138947).

420694705 is an equidigital number, since it uses as much as digits as its factorization.

420694705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84138946.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 420694705 is about 20510.8435955228. The cubic root of 420694705 is about 749.2999126328.

The spelling of 420694705 in words is "four hundred twenty million, six hundred ninety-four thousand, seven hundred five".