64782397 has 2 divisors, whose sum is σ = 64782398. Its totient is φ = 64782396.

The previous prime is 64782373. The next prime is 64782407. The reversal of 64782397 is 79328746.

64782397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48734361 + 16048036 = 6981^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 64782397 - 2⁷ = 64782269 is a prime.

It is a super-2 number, since 2×64782397² = 8393517922131218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64782097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32391198 + 32391199.

It is an arithmetic number, because the mean of its divisors is an integer number (32391199).

Almost surely, 2^64782397 is an apocalyptic number.

It is an amenable number.

64782397 is a deficient number, since it is larger than the sum of its proper divisors (1).

64782397 is an equidigital number, since it uses as much as digits as its factorization.

64782397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 64782397 is about 8048.7512696070. The cubic root of 64782397 is about 401.6233962980.

The spelling of 64782397 in words is "sixty-four million, seven hundred eighty-two thousand, three hundred ninety-seven".