420797771 has 8 divisors (see below), whose sum is σ = 422756064. Its totient is φ = 418844800.

The previous prime is 420797747. The next prime is 420797777. The reversal of 420797771 is 177797024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420797771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420797777) 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, 261050 + ... + 262656.

It is an arithmetic number, because the mean of its divisors is an integer number (52844508).

Almost surely, 2^420797771 is an apocalyptic number.

420797771 is a deficient number, since it is larger than the sum of its proper divisors (1958293).

420797771 is a wasteful number, since it uses less digits than its factorization.

420797771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661.

The product of its (nonzero) digits is 172872, while the sum is 44.

The square root of 420797771 is about 20513.3559175480. The cubic root of 420797771 is about 749.3610979675.

The spelling of 420797771 in words is "four hundred twenty million, seven hundred ninety-seven thousand, seven hundred seventy-one".