420544787 has 4 divisors (see below), whose sum is σ = 452894400. Its totient is φ = 388195176.

The previous prime is 420544783. The next prime is 420544799. The reversal of 420544787 is 787445024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 420544787 - 2² = 420544783 is a prime.

It is a super-3 number, since 3×420544787³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420544783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16174787 + ... + 16174812.

It is an arithmetic number, because the mean of its divisors is an integer number (113223600).

Almost surely, 2^420544787 is an apocalyptic number.

420544787 is a deficient number, since it is larger than the sum of its proper divisors (32349613).

420544787 is a wasteful number, since it uses less digits than its factorization.

420544787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32349612.

The product of its (nonzero) digits is 250880, while the sum is 41.

The square root of 420544787 is about 20507.1886664165. The cubic root of 420544787 is about 749.2108956733.

The spelling of 420544787 in words is "four hundred twenty million, five hundred forty-four thousand, seven hundred eighty-seven".