64250729 has 8 divisors (see below), whose sum is σ = 66017952. Its totient is φ = 62496000.

The previous prime is 64250663. The next prime is 64250743. The reversal of 64250729 is 92705246.

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 64250729 - 2²⁴ = 47473513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64253729) 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, 7817 + ... + 13769.

It is an arithmetic number, because the mean of its divisors is an integer number (8252244).

Almost surely, 2^64250729 is an apocalyptic number.

It is an amenable number.

64250729 is a deficient number, since it is larger than the sum of its proper divisors (1767223).

64250729 is a wasteful number, since it uses less digits than its factorization.

64250729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 64250729 is about 8015.6552445823. The cubic root of 64250729 is about 400.5216714349.

The spelling of 64250729 in words is "sixty-four million, two hundred fifty thousand, seven hundred twenty-nine".