64391129 has 8 divisors (see below), whose sum is σ = 70867872. Its totient is φ = 58018240.

The previous prime is 64391111. The next prime is 64391147. The reversal of 64391129 is 92119346.

It is an interprime number because it is at equal distance from previous prime (64391111) and next prime (64391147).

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

It is a cyclic number.

It is not a de Polignac number, because 64391129 - 2¹⁶ = 64325593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64391149) 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, 24659 + ... + 27144.

It is an arithmetic number, because the mean of its divisors is an integer number (8858484).

Almost surely, 2^64391129 is an apocalyptic number.

It is an amenable number.

64391129 is a deficient number, since it is larger than the sum of its proper divisors (6476743).

64391129 is a wasteful number, since it uses less digits than its factorization.

64391129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51927.

The product of its digits is 11664, while the sum is 35.

The square root of 64391129 is about 8024.4083270980. The cubic root of 64391129 is about 400.8131977366.

It can be divided in two parts, 64 and 391129, that added together give a palindrome (391193).

The spelling of 64391129 in words is "sixty-four million, three hundred ninety-one thousand, one hundred twenty-nine".