64993451 has 2 divisors, whose sum is σ = 64993452. Its totient is φ = 64993450.

The previous prime is 64993441. The next prime is 64993459. The reversal of 64993451 is 15439946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64993451 - 2¹⁰ = 64992427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64993399 and 64993408.

It is not a weakly prime, because it can be changed into another prime (64993459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32496725 + 32496726.

It is an arithmetic number, because the mean of its divisors is an integer number (32496726).

Almost surely, 2^64993451 is an apocalyptic number.

64993451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64993451 is an equidigital number, since it uses as much as digits as its factorization.

64993451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 64993451 is about 8061.8515863293. The cubic root of 64993451 is about 402.0590719526.

The spelling of 64993451 in words is "sixty-four million, nine hundred ninety-three thousand, four hundred fifty-one".