420636089 has 8 divisors (see below), whose sum is σ = 424725000. Its totient is φ = 416564352.

The previous prime is 420636071. The next prime is 420636109. The reversal of 420636089 is 980636024.

It can be written as a sum of positive squares in 4 ways, for example, as 714025 + 419922064 = 845^2 + 20492^2 .

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 420636089 - 2¹² = 420631993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420636289) 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, 47957 + ... + 56045.

It is an arithmetic number, because the mean of its divisors is an integer number (53090625).

Almost surely, 2^420636089 is an apocalyptic number.

It is an amenable number.

420636089 is a deficient number, since it is larger than the sum of its proper divisors (4088911).

420636089 is a wasteful number, since it uses less digits than its factorization.

420636089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8587.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 420636089 is about 20509.4146430365. The cubic root of 420636089 is about 749.2651106706.

The spelling of 420636089 in words is "four hundred twenty million, six hundred thirty-six thousand, eighty-nine".