420989317 has 16 divisors (see below), whose sum is σ = 504748800. Its totient is φ = 343486080.

The previous prime is 420989291. The next prime is 420989323. The reversal of 420989317 is 713989024.

It is not a de Polignac number, because 420989317 - 2²³ = 412600709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420989347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192 + ... + 29017.

It is an arithmetic number, because the mean of its divisors is an integer number (31546800).

Almost surely, 2^420989317 is an apocalyptic number.

It is an amenable number.

420989317 is a deficient number, since it is larger than the sum of its proper divisors (83759483).

420989317 is a wasteful number, since it uses less digits than its factorization.

420989317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29316.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 420989317 is about 20518.0241982507. The cubic root of 420989317 is about 749.4747830969.

It can be divided in two parts, 42098 and 9317, that added together give a palindrome (51415).

The spelling of 420989317 in words is "four hundred twenty million, nine hundred eighty-nine thousand, three hundred seventeen".