421394691 has 16 divisors (see below), whose sum is σ = 603794304. Its totient is φ = 260456064.

The previous prime is 421394683. The next prime is 421394693. The reversal of 421394691 is 196493124.

It is not a de Polignac number, because 421394691 - 2³ = 421394683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421394693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58245 + ... + 65078.

It is an arithmetic number, because the mean of its divisors is an integer number (37737144).

Almost surely, 2^421394691 is an apocalyptic number.

421394691 is a deficient number, since it is larger than the sum of its proper divisors (182399613).

421394691 is a wasteful number, since it uses less digits than its factorization.

421394691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123410.

The product of its digits is 46656, while the sum is 39.

The square root of 421394691 is about 20527.9003066558. The cubic root of 421394691 is about 749.7152643589.

The spelling of 421394691 in words is "four hundred twenty-one million, three hundred ninety-four thousand, six hundred ninety-one".