64774169 has 2 divisors, whose sum is σ = 64774170. Its totient is φ = 64774168.

The previous prime is 64774133. The next prime is 64774201. The reversal of 64774169 is 96147746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62094400 + 2679769 = 7880^2 + 1637^2 .

It is a cyclic number.

It is not a de Polignac number, because 64774169 - 2⁸ = 64773913 is a prime.

It is a super-2 number, since 2×64774169² = 8391385939281122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64774069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32387084 + 32387085.

It is an arithmetic number, because the mean of its divisors is an integer number (32387085).

Almost surely, 2^64774169 is an apocalyptic number.

It is an amenable number.

64774169 is a deficient number, since it is larger than the sum of its proper divisors (1).

64774169 is an equidigital number, since it uses as much as digits as its factorization.

64774169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 64774169 is about 8048.2401181873. The cubic root of 64774169 is about 401.6063922075.

The spelling of 64774169 in words is "sixty-four million, seven hundred seventy-four thousand, one hundred sixty-nine".