64106247 has 16 divisors (see below), whose sum is σ = 92171520. Its totient is φ = 39499200.

The previous prime is 64106243. The next prime is 64106257. The reversal of 64106247 is 74260146.

It is not a de Polignac number, because 64106247 - 2² = 64106243 is a prime.

It is a super-2 number, since 2×64106247² = 8219221808850018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64106243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11379 + ... + 16052.

It is an arithmetic number, because the mean of its divisors is an integer number (5760720).

Almost surely, 2^64106247 is an apocalyptic number.

64106247 is a deficient number, since it is larger than the sum of its proper divisors (28065273).

64106247 is a wasteful number, since it uses less digits than its factorization.

64106247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27494.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 64106247 is about 8006.6376838221. The cubic root of 64106247 is about 400.2212255423.

The spelling of 64106247 in words is "sixty-four million, one hundred six thousand, two hundred forty-seven".