64201139 has 4 divisors (see below), whose sum is σ = 64358520. Its totient is φ = 64043760.

The previous prime is 64201127. The next prime is 64201153. The reversal of 64201139 is 93110246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64201139 - 2¹² = 64197043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64201199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78077 + ... + 78894.

It is an arithmetic number, because the mean of its divisors is an integer number (16089630).

Almost surely, 2^64201139 is an apocalyptic number.

64201139 is a deficient number, since it is larger than the sum of its proper divisors (157381).

64201139 is a wasteful number, since it uses less digits than its factorization.

64201139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157380.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 64201139 is about 8012.5613258184. The cubic root of 64201139 is about 400.4186013628.

The spelling of 64201139 in words is "sixty-four million, two hundred one thousand, one hundred thirty-nine".