420948691 has 8 divisors (see below), whose sum is σ = 442202400. Its totient is φ = 399940992.

The previous prime is 420948683. The next prime is 420948701. The reversal of 420948691 is 196849024.

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 420948691 - 2³ = 420948683 is a prime.

It is a super-2 number, since 2×420948691² = 354395600909226962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420948091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57990 + ... + 64843.

It is an arithmetic number, because the mean of its divisors is an integer number (55275300).

Almost surely, 2^420948691 is an apocalyptic number.

420948691 is a deficient number, since it is larger than the sum of its proper divisors (21253709).

420948691 is a wasteful number, since it uses less digits than its factorization.

420948691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123005.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 420948691 is about 20517.0341667601. The cubic root of 420948691 is about 749.4506739008.

It can be divided in two parts, 4209 and 48691, that added together give a square (52900 = 230²).

The spelling of 420948691 in words is "four hundred twenty million, nine hundred forty-eight thousand, six hundred ninety-one".