64711291 has 4 divisors (see below), whose sum is σ = 66798784. Its totient is φ = 62623800.

The previous prime is 64711289. The next prime is 64711303. The reversal of 64711291 is 19211746.

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 64711291 - 2¹ = 64711289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2087461 = 64711291 / (6 + 4 + 7 + 1 + 1 + 2 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64711211) 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, 1043700 + ... + 1043761.

It is an arithmetic number, because the mean of its divisors is an integer number (16699696).

Almost surely, 2^64711291 is an apocalyptic number.

64711291 is a deficient number, since it is larger than the sum of its proper divisors (2087493).

64711291 is a wasteful number, since it uses less digits than its factorization.

64711291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087492.

The product of its digits is 3024, while the sum is 31.

The square root of 64711291 is about 8044.3328499012. The cubic root of 64711291 is about 401.4764001519.

The spelling of 64711291 in words is "sixty-four million, seven hundred eleven thousand, two hundred ninety-one".