64531117 has 8 divisors (see below), whose sum is σ = 74851136. Its totient is φ = 54486432.

The previous prime is 64531109. The next prime is 64531151. The reversal of 64531117 is 71113546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64531117 - 2³ = 64531109 is a prime.

It is a super-2 number, since 2×64531117² = 8328530122535378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64541117) 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, 68328 + ... + 69265.

It is an arithmetic number, because the mean of its divisors is an integer number (9356392).

Almost surely, 2^64531117 is an apocalyptic number.

64531117 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

64531117 is a deficient number, since it is larger than the sum of its proper divisors (10320019).

64531117 is a wasteful number, since it uses less digits than its factorization.

64531117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137667.

The product of its digits is 2520, while the sum is 28.

The square root of 64531117 is about 8033.1262283124. The cubic root of 64531117 is about 401.1034469629.

The spelling of 64531117 in words is "sixty-four million, five hundred thirty-one thousand, one hundred seventeen".