64779263 has 2 divisors, whose sum is σ = 64779264. Its totient is φ = 64779262.

The previous prime is 64779241. The next prime is 64779269. The reversal of 64779263 is 36297746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64779263 - 2¹⁴ = 64762879 is a prime.

It is a super-3 number, since 3×64779263³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64779269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32389631 + 32389632.

It is an arithmetic number, because the mean of its divisors is an integer number (32389632).

Almost surely, 2^64779263 is an apocalyptic number.

64779263 is a deficient number, since it is larger than the sum of its proper divisors (1).

64779263 is an equidigital number, since it uses as much as digits as its factorization.

64779263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 44.

The square root of 64779263 is about 8048.5565786668. The cubic root of 64779263 is about 401.6169197031.

The spelling of 64779263 in words is "sixty-four million, seven hundred seventy-nine thousand, two hundred sixty-three".