63774391 has 2 divisors, whose sum is σ = 63774392. Its totient is φ = 63774390.

The previous prime is 63774383. The next prime is 63774433. The reversal of 63774391 is 19347736.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63774391 - 2³ = 63774383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63772391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31887195 + 31887196.

It is an arithmetic number, because the mean of its divisors is an integer number (31887196).

Almost surely, 2^63774391 is an apocalyptic number.

63774391 is a deficient number, since it is larger than the sum of its proper divisors (1).

63774391 is an equidigital number, since it uses as much as digits as its factorization.

63774391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 40.

The square root of 63774391 is about 7985.8869889324. The cubic root of 63774391 is about 399.5294278718.

The spelling of 63774391 in words is "sixty-three million, seven hundred seventy-four thousand, three hundred ninety-one".