64998131 has 4 divisors (see below), whose sum is σ = 70907064. Its totient is φ = 59089200.

The previous prime is 64998091. The next prime is 64998151. The reversal of 64998131 is 13189946.

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 64998131 - 2¹⁴ = 64981747 is a prime.

It is a super-3 number, since 3×64998131³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64998151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2954450 + ... + 2954471.

It is an arithmetic number, because the mean of its divisors is an integer number (17726766).

Almost surely, 2^64998131 is an apocalyptic number.

64998131 is a deficient number, since it is larger than the sum of its proper divisors (5908933).

64998131 is a wasteful number, since it uses less digits than its factorization.

64998131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908932.

The product of its digits is 46656, while the sum is 41.

The square root of 64998131 is about 8062.1418370058. The cubic root of 64998131 is about 402.0687221110.

The spelling of 64998131 in words is "sixty-four million, nine hundred ninety-eight thousand, one hundred thirty-one".