420939577 has 8 divisors (see below), whose sum is σ = 426197664. Its totient is φ = 415708608.

The previous prime is 420939559. The next prime is 420939581. The reversal of 420939577 is 775939024.

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-420939577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420939527) 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, 25398 + ... + 38560.

It is an arithmetic number, because the mean of its divisors is an integer number (53274708).

Almost surely, 2^420939577 is an apocalyptic number.

It is an amenable number.

420939577 is a deficient number, since it is larger than the sum of its proper divisors (5258087).

420939577 is a wasteful number, since it uses less digits than its factorization.

420939577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13559.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 420939577 is about 20516.8120574323. The cubic root of 420939577 is about 749.4452650526.

The spelling of 420939577 in words is "four hundred twenty million, nine hundred thirty-nine thousand, five hundred seventy-seven".