64351439 has 2 divisors, whose sum is σ = 64351440. Its totient is φ = 64351438.

The previous prime is 64351433. The next prime is 64351453. The reversal of 64351439 is 93415346.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64351439 - 2¹² = 64347343 is a prime.

It is a super-2 number, since 2×64351439² = 8282215402741442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 64351399 and 64351408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64351433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32175719 + 32175720.

It is an arithmetic number, because the mean of its divisors is an integer number (32175720).

Almost surely, 2^64351439 is an apocalyptic number.

64351439 is a deficient number, since it is larger than the sum of its proper divisors (1).

64351439 is an equidigital number, since it uses as much as digits as its factorization.

64351439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 64351439 is about 8021.9348663524. The cubic root of 64351439 is about 400.7308284944.

The spelling of 64351439 in words is "sixty-four million, three hundred fifty-one thousand, four hundred thirty-nine".