64091031 has 8 divisors (see below), whose sum is σ = 85540224. Its totient is φ = 42684600.

The previous prime is 64091021. The next prime is 64091057. The reversal of 64091031 is 13019046.

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

It is not a de Polignac number, because 64091031 - 2¹⁰ = 64090007 is a prime.

It is a super-2 number, since 2×64091031² = 8215320509285922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64090992 and 64091010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64091021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7011 + ... + 13316.

It is an arithmetic number, because the mean of its divisors is an integer number (10692528).

Almost surely, 2^64091031 is an apocalyptic number.

64091031 is a deficient number, since it is larger than the sum of its proper divisors (21449193).

64091031 is a wasteful number, since it uses less digits than its factorization.

64091031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21381.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 64091031 is about 8005.6874158313. The cubic root of 64091031 is about 400.1895580718.

The spelling of 64091031 in words is "sixty-four million, ninety-one thousand, thirty-one".