64611247 has 2 divisors, whose sum is σ = 64611248. Its totient is φ = 64611246.

The previous prime is 64611233. The next prime is 64611251. The reversal of 64611247 is 74211646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64611247 - 2⁷ = 64611119 is a prime.

It is a super-2 number, since 2×64611247² = 8349226477790018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64611227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32305623 + 32305624.

It is an arithmetic number, because the mean of its divisors is an integer number (32305624).

Almost surely, 2^64611247 is an apocalyptic number.

64611247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64611247 is an equidigital number, since it uses as much as digits as its factorization.

64611247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 64611247 is about 8038.1121539824. The cubic root of 64611247 is about 401.2693985569.

The spelling of 64611247 in words is "sixty-four million, six hundred eleven thousand, two hundred forty-seven".