64131109 has 8 divisors (see below), whose sum is σ = 73601280. Its totient is φ = 54738096.

The previous prime is 64131097. The next prime is 64131121. The reversal of 64131109 is 90113146.

It is an interprime number because it is at equal distance from previous prime (64131097) and next prime (64131121).

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

It is not a de Polignac number, because 64131109 - 2⁹ = 64130597 is a prime.

It is a super-2 number, since 2×64131109² = 8225598283139762, 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 (64131149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17494 + ... + 20839.

It is an arithmetic number, because the mean of its divisors is an integer number (9200160).

Almost surely, 2^64131109 is an apocalyptic number.

It is an amenable number.

64131109 is a deficient number, since it is larger than the sum of its proper divisors (9470171).

64131109 is a wasteful number, since it uses less digits than its factorization.

64131109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38579.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 64131109 is about 8008.1901201208. The cubic root of 64131109 is about 400.2729574432.

The spelling of 64131109 in words is "sixty-four million, one hundred thirty-one thousand, one hundred nine".